Advertisements
Advertisements
प्रश्न
Explain the difference between potential energy and kinetic energy.
Advertisements
उत्तर
| 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
संबंधित प्रश्न
Kinetic energy = 1/2 × mass × ............
Two toy-cars A and Bof masses 200 g and 500 g respectively are moving with the same speed. Which of the two has greater kinetic energy?
A ball of mass M is moving with a speed v. What is its kinetic energy?
A car is moving with a speed of 15 km h-1 and another identical car is moving with a speed of 30 km h-1. Compare their kinetic energy.
A body is thrown vertically upwards. Its velocity keeps on decreasing. What happens to its kinetic energy as its velocity becomes zero?
A body falls freely under gravity from rest. Name the kind of energy it will possess on reaching the ground.
On what factors does the kinetic energy of a body depend?
Find the momentum of a body of mass 100 g having a kinetic energy of 20 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.
A body of 2 kg falls from rest. What will be its kinetic energy during the fall at the end of 2 s? (Assume g = 10 m/s2)
A car is accelerated on a levelled road and attains a speed of 4 times its initial speed. In this process, the kinetic energy of the car :
If an object has 0 momentum, does it have kinetic energy? Explain your answer.
Find out the form of energy possessed by the following thing.
Water falls
An apple falling from a tree is an example for kinetic energy.
Explain the types of mechanical energy.
The energy possessed by a cricket ball bowled by a player is ______.
What is energy of motion? Give examples.
A car of mass 120 kg is moving at a speed 18 km/h and it accelerates to attain a speed of 54 km/h in 5 seconds. Calculate:
- the work done by the engine.
- the power of the engine.
Find the kinetic energy of a body of mass 5 kg moving with a uniform velocity of 10 m s-1.
