Answers
Answer:
4116J
Explanation:
Given parameters:
Mass of the person = 70kg
Height of the ladder = 6m
Unknown:
Work done = ?
Solution:
The work done by the person climbing is the same as the potential energy.
Work done is the force applied to move a body through a distance;
So;
Potential energy = mass x acceleration due to gravity x height
Therefore;
Potential energy = 70 x 9.8 x 6 = 4116J
Related Questions
1. Can you give an example of any energy transformation where there is no
dissipation of energy?
Answers
Answer:
The notable examples are metal bearings, with occasional lumps on the otherwise smooth surfaces catching against each other, and the flow of an electric
Conversions of Kinetic energy to and from potential energy in vacuum converts with very little loss. If you throw a rock up against gravity in a vacuum, that rock will reach a potential energy that is almost exactly equal to the initial kinetic energy. When the rock reaches its peak and comes back down, its kinetic energy will be almost exactly the same when it reaches the original altitude.
Two atoms of the same element only differ because one of the atoms has more electrons, making it an ion. Which statement is true? They have the same A-number and the same Z-number. They have the same A-number but different Z-number. They have a different A-number but the same Z-number. They have different A-numbers and different Z-numbers.
Answers
The correct answer is Option B. The statement "they have the same A-number but different Z-number" is true .
Atoms of the same element only differ because one of the atoms has more electrons, making it an ion.
This difference does not affect the mass of the atom, which is determined by the sum of its protons and neutrons, represented by the atomic mass or A-number.
The number of protons in an atom is called the atomic number or Z-number.
The Z-number of an element is unique to it. All the atoms of a given element have the same number of protons.
Thus, for example, all carbon atoms have six protons, making the Z-number of carbon 6.
However, different isotopes of an element can have different numbers of neutrons.
This means that they have a different atomic mass or A-number.
Therefore, they have the same A-number but different Z-number.
Therefore the correct Option is B.
For more questions on Atoms
https://brainly.com/question/6258301
#SPJ8
How has Physics improved
or affected our society?
Answers
By supplying the fundamental knowledge required to create new instruments and techniques for medical use, physics enhances our quality of life
From can openers, light bulbs, and mobile phones to muscles, lungs, and brains; from paintings, piccolos, and pirouettes to cameras, vehicles, and cathedrals; from earthquakes, tsunamis, and storms to quarks, DNA, and black holes, physics aids us in understanding the workings of the world around us.
The science of physics is the most fundamental and has many applications in contemporary technology. Because it makes it possible for smartphones, computers, televisions, watches, and many other modern technologies to function automatically, physics is crucial to modern technology.
To learn more about physics please visit-
https://brainly.com/question/14338730
#SPJ9
What is the total electrical energy used by a 1500 watt hair dryer operating for 6.0 minutes?
Answers
a 1500 watt hair dryer uses 1500 J every second.
1500 J = 1500 Ws = 1500/3600 Wh = 0.000417 kWh
For more answers, Contact:
https://brainly.com/app/profile/63103549/answers
Describe how the human ear hears sound.
Answers
Answer:
sound waves enter the outer ear and travel through a narrow passageway called the ear canal, which leads to the eardrum. The eardrum vibrates from the incoming sound waves and sends these vibrations to three tiny bones in the middle ear.
Explanation:
A mini spherical cow is thrown upwards with an initial velocity of 7.0 m/s. Remembering that earth's acceleration due to gravity is -9.8, what is the cow's height after 0.73 s?
Answers
A minispherical cow is thrown upwards with an initial velocity of 7.0 m/s; the earth's acceleration due to gravity is -9.8 m/s, and the cow's height after 0.73 s is approximately 2.64 m above its initial position.
What is the height of the cow?h = \(V_i\)t + (1/2)g\(t^2\)
(Here, h = the height of the cow above its initial position \(V_i\)= the initial velocity of the cow that is 7.0 m/s upwards, g = acceleration due to gravity that is -9.8 m/\(s^2\) downwards, t = the time since the cow was thrown)
putting in the given values, one can get:
h = (7.0 m/s)(0.73 s) + (1/2)(-9.8 m/\(s^2\))\((0.73 s)^2\)
h ≈ 2.64 meters
Hence, the cow's height after 0.73 seconds is approximately 2.64 meters above its initial position .
Learn more about the height of the cow here.
https://brainly.com/question/29170436
#SPJ1
The position
Of a body is described by S= t^3-2t + 5 find v in m/s when t=3s
Answers
To find the velocity at a particular time, we need to take the derivative of the position function with respect to time and then evaluate the result at that time.
The derivative of the position function, S = t^3 - 2t + 5, with respect to time is:
dS/dt = 3t^2 - 2
Therefore, the velocity at t = 3s is:
v = 3 * 3^2 - 2 = 3 * 9 - 2 = 27 - 2 = 25 m/s.
PLEASE HELP!!!!
A person pushes attempts to push a couch with a 25 N force. The couch, however, doesn't move. What is the static friction force acting on the couch? *
A. 25 N
B. 0 N
C. 50 N
D. There is no static friction the ONLY force acting on the couch is the push
Answers
Static friction cancels out the force of the push, so it also has a magnitude of 25 N.
what type of tide occurs when the moon is in the positions marked by the straight arrows in this image? please give one word as your answer.
Answers
The positions marked by the straight arrows in the image are the first quarter and third quarter phases of the Moon the tide that occurs is called a "neap tide".
What is neap tide?
During these phases, the Moon and the Sun are at right angles to each other with respect to the Earth, which causes the gravitational forces of the Moon and the Sun to partially cancel out. As a result, the tidal range is at its minimum, and the tide that occurs is called a "neap tide". Therefore, the answer is "neap".
What is gravitational forces?
Gravitational forces refer to the attractive force that exists between any two objects in the universe that have mass. This force is governed by Newton's law of universal gravitation, which states that the gravitational force between two objects is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers.
This means that the larger the mass of the objects, the stronger the gravitational force between them, and the farther apart they are, the weaker the gravitational force. Gravitational forces are responsible for keeping celestial bodies, such as planets, moons, and stars, in their orbits, and for the phenomena of tides on Earth caused by the gravitational pull of the Moon and the Sun.
To know more about neap tide, visit:
https://brainly.com/question/29417771
#SPJ1
Complete question is: "neap tide" type of tide occurs when the moon is in the positions marked by the straight arrows in this image.
A trebuchet launches a pumpkin at an angle of 63 degrees at an initial velocity of 51 m/ s from the ground. What is the range of the pumpkin?
Answers
Answer:
214.72m
Explanation:
The range (R) of a projectile can be calculated using the formula:
R = u²sin2θ/g
Where R = Horizontal range
u = initial velocity
θ = angle of initial velocity
g = acceleration due to gravity (9.8m/s²)
According to the provided information in this question, R= ?, u= 51m/s, θ = 63°, g = 9.8m/s².
Hence, R = u²sin2θ/g
R = 51² × sin 2×63/ 9.8
R = 2601 × sin 126/9.8
R = 2601 × 0.809/9.8
R = 2104.25/9.8
R = 214.72m
(Figure 1) shows a thin liquid film bounded on the right side by a sliding wire that is attached to a spring with spring constant 0.50 N/m. The spring is stretched by 1.3 cm. What is the liquid's surface tension in mN/m?
Answers
The liquid's surface tension in N/m is determined as 0.25 N/m.
What is surface tension?
Surface tension is defined as the property of the surface of a liquid that allows it to resist an external force, due to the cohesive nature of its molecules.
Mathematically, the formula for surface tension of a liquid is given as;
γ = F/L
γ = F/2x
where;
F is the applied forcex is the extension of the springγ is the surface tensionFrom Hooke's law, the force applied on an elastic material is directly proportional to the extension of the material.
F = kx
where;
k is the spring constantx is the extension of the springThe final equation for the surface tension of the liquid film becomes;
γ = F/2x
γ = kx/2x
γ = k/2
γ = (0.5 N/m) / 2
γ = 0.25 N/m
Thus, the surface tension of a liquid depends on the applied force and length of the liquid surface.
Learn more about surface tension here: https://brainly.com/question/22484004
#SPJ1
What is the gain in gravitational potential energy of a body of weight 2000N as it rises from a height of 20m to a height of 25 m above the Earth's surface
Answers
Answer:
Explanation:
GPE =weight * height
= 2000*(25-20)
= 10000 J
Gain of Gravitation Potential energy = 10,000 J
What is Gravitation Potential Energy ?
It is the energy acquired by an object due to a change in its position when it is present in a gravitational field .
To calculate gravitational potential energy at height h , formula used is = m g h where m = mass of the body
g = acceleration due to gravity
h = height from the ground
Gain of Gravitation Potential energy = mg(h2 - h1 ) h2 = final height
h1 = initial height
= 2000 (25 -20) (since , mg =weight)
Gain of Gravitation Potential energy = 10,000 J
Learn more about Gravitation Potential energy :
https://brainly.com/question/3884855?referrer=searchResults
#SPJ2
a
The
is a point that lies along a vertical line drawn from the suspension point of an object when the object is at
a standstill.
centripetal force
b. center of mass
c. equilibrium
d. center point
Answers
8. Miss D. Water, a stunt diver in the circus, had 15,000.0 J of kinetic energy immediately before diving
into a bucket of water at a speed of 24.0 m/s. What is her mass?
Answers
The mass of the bucket of water is 52.08kg whose kinetic energy is 15,000J with the speed of 24 m/s.
What is Kinetic energy?Kinetic energy is defined as the energy which is due to the motion of an object. When we want to accelerate an object, we must apply a force, thus by applying a force we need to do work. After the work is done, energy has been transferred to the object which will continue to move with a new constant speed.
The kinetic energy is given by
\(K.E.= \frac{1}{2} mass* velocity^2\)
For above given example,
K.E.= 15,000 J
velocity= 24m/s
\(15000= 1/2 mass *\) \((24)^2\)
\(\frac{15000* 2}{24*24} = Mass\)
\(Mass= \frac{30000}{576}\)
Mass= 52.08 kg
Thus, the mass of the bucket of water is 52.08kg whose kinetic energy is 15,000J with the speed of 24 m/s.
Learn more about Kinetic energy, here:
https://brainly.com/question/26472013
#SPJ9
Two billiard balls, each with a mass of 0.21 kg, collide with each other on a pool table. Before the collision, one ball is moving north at 1.7 m/s and the other ball is moving south at 2.6 m/s. What is the momentum of this system after the collision? A. 0.19 kg-m/s north OB. 0.19 kg m/s south C. 0.90 kg-m/s north D. 0.90 kg-m/s south
Answers
Answer:
Explanation:
Ok I am an expert in this class. two balls which is 32 weighted for both. 21+21=41+1.7=42.7/4=10.7
Both would=10.7
A roller coaster is at a peak of 20m and has a mass of 900kg. What is the potential energy of the roller coaster?
O 100000 J
10000 J
O 9.8 J
O 176400 J
Answers
The potential energy of the roller coaster is 176,400 J (joules).
The potential energy of an object is given by the formula PE = mgh, where PE is the potential energy, m is the mass of the object, g is the acceleration due to gravity, and h is the height or vertical position of the object.
In this case, the roller coaster is at a peak of 20m and has a mass of 900kg. The acceleration due to gravity, g, is approximately 9.8 \(m/s^2\).
Using the formula, we can calculate the potential energy:
PE = mgh
= (900 kg)(9.8 \(m/s^2\))(20 m)
= 176,400 J
Therefore, the potential energy of the roller coaster is 176,400 J (joules).
Know more about potential energy here:
https://brainly.com/question/21175118
#SPJ8
POSSIBLE POINTS: 1
After the Frisbee falls to the ground, you throw one of them back up into the tree, where it comes to rest on a branch.
Compared to when the Frisbee was on the ground, which of the following is true about the potential energy of the system?
Answers
Answer:
the effect on energy is due to the force applied to the frisbee to throw it back in the tree.
Explanation:
Question 2 of 10
Which of the following represents a beta particle?
O A. e
OB. Y
O C. a
O D. He
Answers
I think A: e
Please help answer 1,2,3.

Answers
Answer:
gbh
Explanation:
Calculate the total current in parallel circuit using Kirchhoff’s Current Law? anyone give example and solution...
Answers
Answer:
please check attachment and follow the steps.
A marble is placed at the bottom of a semi-spherical bowl, as shown in the figure. The marble is then displaced from the bottom of the bowl to a position about halfway from the top of the bowl. The marble is then released from rest such that the marble always remains in contact with the bowl. Students observe that the marble rolls back and forth as it oscillates about the bottom of the bowl. Which of the following statements best explains why the marble undergoes oscillatory motion?
a)The sides of the bowl become steeper at positions farther from the bottom of the bowl.b) The net force exerted on the marble always has a component directed toward the bottom of the bowl. c) The normal force exerted on the marble decreases with increasing distance from the bottom of the bowl. D ) The gravitational force exerted on the marble is constant in magnitude and direction.
Answers
Answer:
It is D
Explanation:
The explanation why the marble undergoes oscillatory motion should be option D.
What is oscillatory motion?An object should be classified as the motion oscillates related to an equilibrium position because of the restoring force or torque. This motion should be significant to study various phenomena like electromagnetic waves, molecules. etc. In the case when the gravitational force should be exerted on the marble here the magnitude and the direction should be the same.
learn more about the motion here: https://brainly.com/question/16335988
On the upper surface of Jupiter's atmosphere, the attractive force of gravity is 2.5 times that on Earth. What would a bathroom scale show if a 50 kg person were weighed on Jupiter?
Answers
Explanation:
The weight of an object is the force of gravity acting on it. Therefore, we can use the formula:
where mass is the mass of the person and gravitational acceleration is the acceleration due to gravity on Jupiter.
On Earth, the acceleration due to gravity is approximately 9.8 m/s^2. On Jupiter, the acceleration due to gravity is 2.5 times that on Earth, so it is:
2.5 x 9.8 m/s^2 = 24.5 m/s^2
Therefore, the weight of a 50 kg person on Jupiter would be:
weight = 50 kg x 24.5 m/s^2 = 1225 N
So a bathroom scale on Jupiter would show a weight of approximately 1225 newtons (N) for a 50 kg person
The weight of a 50 kg person on Jupiter can be calculated using the following formula:
Weight on Jupiter = Mass x Gravity on Jupiter
where the mass of the person is 50 kg and the gravity on Jupiter is 2.5 times that on Earth, which is approximately 24.79 m/s^2.
Weight on Jupiter = 50 kg x 24.79 m/s^2
Weight on Jupiter = 1239.5 N
Therefore, a bathroom scale would show a weight of 1239.5 Newtons for a 50 kg person on the upper surface of Jupiter's atmosphere.
before leaving earth, the mass if an astronaut is measured to be 60kg. the astronaut lands on the moon and measures the acceleration of gravity to be 1.6 m/s^2. what is the mass of the astronaut at moon?
Answers
Answer:
The answer is 2,475$+948= add you will get the answer rn
The weight we experience on a surface is the product of our mass and acceleration due to gravity on that surface. The mass of the astronaut in earth was 60 kg . Then his mass at moon will be 9.76 kg.
What is gravitational force ?The gravitational force is the force by which an object attracts other objects into its center of mass. Earth attracts every objects into its center. That why we are all standing on the ground.
The weight we experience on earth is due to the gravity. That is the product of mass and acceleration due to gravity of a planet is the weight on the planet.
The weight of astronaut in earth = 60 kg
acceleration due to gravity on earth = 9.8 m/s²
mass = 60/9.8 m/s² = 6.19 kg
Acceleration due gravity on moon = 1.6 m/s²
then weight on moon = 1.6 m/s² ×6.19 kg = 9.7 kg.
Therefore, the weight of the astronaut in moon will be 9.7 kg.
Find more on gravitational force:
https://brainly.com/question/24783651
#SPJ5
Tarik winds a small paper tube uniformly with 163 turns of thin wire to form a solenoid. The tube's diameter is 6.13 mm and its length is 2.49 cm . What is the inductance, in microhenrys, of Tarik's solenoid?
Answers
Answer:
The inductance is \(L = 40\mu H\)
Explanation:
From the question we are told that
The number of turns is \(N = 163 \ turns\)
The diameter is \(D = 6.13 \ mm = 6.13 *10^{-3} \ m\)
The length is \(l = 2.49 \ cm = 0.0249 \ m\)
The radius is evaluated as \(r = \frac{d}{2}\)
substituting values
\(r = \frac{6.13 *10^{-3}}{2}\)
\(r = 3.065 *10^{-3} \ m\)
The inductance of the Tarik's solenoid is mathematically represented as
\(L = \frac{\mu_o * N^2 * A }{l }\)
Here \(\mu_o\) is the permeability of free space with value
\(\mu_o = 4\pi *10^{-7} \ N/A^2\)
A is the area which is mathematically evaluated as
\(A = \pi r^2\)
substituting values
\(A = 3.142 * [ 3.065*10^{-3}]^2\)
\(A = 2.952*10^{-5} \ m^2\)
substituting values into formula for L
\(L = \frac{ 4\pi *10^{-7} * [163]^2 * 2.952*10^{-5} }{0.0249 }\)
\(L = 40\mu H\)
precaution taken to ensure accuracy
Answers
A ball dropped from a window strikes the ground at 4.00 s later. How high is the window above the ground?
Answers
Answer:
15
Explanation:
A plane is landing at an airport. The plane has a massive amount of kinetic energy due to it's motion. When the plane lands, it activates its brakes, causing it to slow down and eventually stop. The kinetic energy that the plane had is now gone. In keeping with the Law of Conservation of Energy, which of the following is the most likely explanation of what happened to that energy?
A. The brakes used a coil system to convert the kinetic energy into potential energy stored in the brakes
B. The kinetic energy of the plane gets pushed into the air in front of it due to drag forces, causing the air to move, thus transferring the kinetic energy from the plane to the air
C. The brakes create friction, which transformed the kinetic energy to heat energy that was dissipated to the surroundings
D. The kinetic energy is being converted into sound energy by the loud engines of the plane
Answers
Answer:
A. The brakes used a coil system to convert the kinetic energy into potential energy stored in the brakes
Explanation:
Based on the law of conservation of energy, the brakes used a coil system to convert the kinetic energy into potential energy stored in the brakes.
The law of conservation of energy states that energy is neither created nor destroyed in a system but it is transformed from one form to another.
As the airplane slows down, the kinetic energy which is presented in the motion of the plane is gradually converted to potential energy.
The potential energy is the energy due to the position of a body.
A low sounding note has a frequency of 40 HZ and a speed in the air of 340 m/s How long in that wave?
Answers
Given,
The frequency of the sound, f=40 Hz
The speed of the sound in the air, c=340 m/s
The speed of a wave in a medium is given by the product of the frequency and the wavelength of the wave.
Thus the speed of the sound with the given frequency is calculated using the formula,
\(c=\lambda f\)Where λ is the wavelength of the wave.
On rearranging the above equation,
\(\lambda=\frac{c}{f}\)On substituting the known values,
\(\begin{gathered} \lambda=\frac{340}{40} \\ =8.5\text{ m} \end{gathered}\)Thus the length of the wave or the wavelength of the given wave is 8.5 m
If the average hang time of a professional football kick is 4.4s, then determine the average maximum height.
Answers
The average highest height of a professional football kick is 189.728 m if the hang time is 4.4 seconds on average.
What is meant by hang time?A person or an object's total duration in the air after leaving the ground is known as their "hang time." From the time anything leaves the ground until it returns, it is measured.
We know,
y= gt²
Here,
y = Average maximum height
g = acceleration due to gravity
t = Average hang time
Given,
Average hang time (t) = 4.4s
Acceleration due to gravity (g) = 9.8 m/s² (assuming)
Inserting these values in the given equation,
y = gt²
= 9.8×4.4×4.4
= 189.728 m.
Hence, the average maximum height of the football is 189.728 m.
To know more about acceleration due to gravity please click here https://brainly.com/question/88039
#SPJ1
an object that is 42kg is a free fall, experiencing an acceleration from gravity (g=9.8m/s^2). what is the force of gravity on the object, assuming no air resistance
Answers
Answer:
411.6 N
Explanation:
The force is given by ...
F = ma . . . . m represents mass
F = (42 kg)(9.8 m/s^2) = 411.6 N . . . . m represents meters
The force on the object due to gravity is 411.6 newtons.