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प्रश्न
Define the term kinetic energy. Give one example of a body which possesses kinetic energy.
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उत्तर
- The energy of a body in motion is called its kinetic energy.
- It is defined as follows:
Kinetic energy of a body is the energy possessed by it due to its state of motion. Actually, it is the work done on the body bringing it to the state of motion. - In short form, it is written as K.E. or K.
- Example: In a swinging pendulum moving to and fro, the bob has the kinetic energy.
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संबंधित प्रश्न
What is the kinetic energy of an object?
Write an expression for the kinetic energy of an object.
The kinetic energy of a body is the energy by virtue of its ______.
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 of mass 60 kg has the momentum 3000 kg m s-1. Calculate:
- the kinetic energy.
- the speed of the body.
A body falls freely under gravity from rest. Name the kind of energy it will possess on reaching the ground.
If the speed of a body is halved, what will be the change in its kinetic energy?
Which would have a greater effect on the kinetic energy of an object : doubling the mass or doubling the velocity?
An apple falling from a tree is an example for kinetic energy.
Water stored in water dams possesses kinetic energy.
