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Question

If a ball of mass 1 kg is falling from a height 10 m. What will be the kinetic energy of the ball when it hits the ground?( take g = 10 m/s2) and neglect air drag.


  1. 100J

  2. 50J

  3. 10J

  4. 0


Solution

The correct option is A

100J


Initially, the ball has a potential energy which is later converted to kinetic energy.
Potential energy = 1×10×10 = 100 joules
When the ball reaches the bottom, all its potential energy is converted to kinetic energy so,
Kinetic energy = 100 joules.

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