Table of Contents
- 1 What is the potential energy acted on a 5kg box which lifted to a height of 3m?
- 2 What is the gravitational potential energy in the lifted position?
- 3 How do you find the potential energy of gravity?
- 4 What is the relationship between work done and gravitational potential energy?
- 5 How many joules of potential energy does a 3kg object have?
What is the potential energy acted on a 5kg box which lifted to a height of 3m?
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| a. energy, work | b. power, work | d. work, power |
|---|---|---|
| e. power, energy | f. force, work | h. none of these |
What is the gravitational potential energy in the lifted position?
Since the force required to lift it is equal to its weight, it follows that the gravitational potential energy is equal to its weight times the height to which it is lifted. PE = kg x 9.8 m/s2 x m = joules.
What is the gravitational potential energy of a 61.2 kg person standing on the roof?
U is the change in PE, m is the mass raised through a distance h. So, given m = 61.2 kg, each 1 m rise is an increase of (61.2)(9.8) = 600 J.
How do you find the potential energy of gravity?
The easiest way to calculate gravitational potential energy is to use our potential energy calculator. This tool estimates the potential energy on the basis of three values. These are: The mass of the object. Gravitational acceleration, which on Earth amounts to 9,81 m/s². The height of the object.
What is the relationship between work done and gravitational potential energy?
Gravitational potential energy and work done. If an object is lifted, work is done against the force of gravity. When work is done energy is transferred to the object and it gains gravitational potential energy. If the object falls from that height, the same amount of work would have to be done by the force of gravity to bring it back to
What happens to the gravitational potential energy when a ball is dropped?
The gravitational potential energy is converted to kinetic energy. Gravitational potential energy at the top = kinetic energy at the bottom A ball of mass 0.4 kg is lifted to a height of 2.5 m. It is then dropped, from rest. The ball returns to the ground with a speed of 7.1 m/s.
How many joules of potential energy does a 3kg object have?
In this example, a 3 kilogram mass, at a height of 5 meters, while acted on by Earth’s gravity would have 147.15 Joules of potential energy, PE = 3kg * 9.81 m/s 2 * 5m = 147.15 J. 9.81 meters per second squared (or more accurately 9.80665 m/s 2) is widely accepted among scientists as a working average value for Earth’s gravitational pull.