Advertisements
Advertisements
Question
Explain the difference between potential energy and kinetic energy.
Advertisements
Solution
| S. No. | Potential Energy | Kinetic Energy |
| 1. | It is possessed by a body by virtue of its configuration and position. | It is possessed by a body by virtue of its motion. |
| 2. | It exists in several forms, including gravitational potential energy and electric potential energy, but work is not completed until it is converted into kinetic energy. | It only exists in one form and does not need to be converted into another in order to perform tasks. |
| 3. | Gravitational potential energy = mgh | Kinetic energy = `1/2 "mv"^2` |
| 4. | Potential energy can be negative. | Kinetic energy cannot be negative. |
| 5. | Eg: A book kept on a shelf has potential energy. | Eg: A moving car possesses kinetic energy. |
APPEARS IN
RELATED QUESTIONS
An object of mass 40 kg is raised to a height of 5 m above the ground. What is its potential energy? If the object is allowed to fall, find its kinetic energy when it is half-way down.
When a boy doubles his speed, his kinetic energy becomes
Define the term kinetic energy. Give one example of a body which possesses kinetic energy.
A ball of mass M is moving with a speed v. What is its kinetic energy?
When an arrow is shot from a bow, it has kinetic energy in it. Explain briefly from where does it get its kinetic energy?
If the speed of a car is halved, how does its kinetic energy change?
A truck weighing 1000 kgf changes its speed from 36 km h-1 to 72 km h-1 in 2 minutes. Calculate:
- the work done by the engine and
- its power (g = 10 m s-2)
A body is thrown vertically upwards. Its velocity keeps on decreasing. What happens to its kinetic energy as its velocity becomes zero?
Two bodies have masses in the ratio 5 : 1 and their kinetic energies are in the ratio 125 : 9. Calculate the ratio of their velocities.
Which would have a greater effect on the kinetic energy of an object : doubling the mass or doubling the velocity?
How fast should a man of 50 kg run so that his kinetic energy be 625 J?
Two objects having equal masses are moving with uniform velocities of 2 m/s and 6 m/s respectively. Calculate the ratio of their kinetic energies.
When a ball is thrown inside a moving bus, does its kinetic energy depend on the speed of the bus? Explain.
Derive the formula for the kinetic energy of an object of mass m, moving with velocity v.
If an object has 0 momentum, does it have kinetic energy? Explain your answer.
Explain the types of mechanical energy.
When a bell fixed on a cycle rings, then the energy conversion that takes place is ______.
If the mass as well as the velocity of a body is doubled then the kinetic energy of the body ______ the initial kinetic energy.
Find the kinetic energy of a body of mass 5 kg moving with a uniform velocity of 10 m s-1.
