Question

a body of mass 1kg drops from the top tower of height 50m what will be its k.e 10m below the top

Answer 1

Explanation:

A body of mass 1.0kg is dropped from the top of a tower of height 50m. ... Kinetic Energy of the body of 1 kg after a fall through of 10m = ½ m v² = ½ × 1× 40 = 20 Joule.

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Answer 2

Answer:

Assuming that there is no air resistance (no heat energy produced) then the loss in gravitational potential energy (mgh) equals the gain in kinetic energy.

The kinetic energy at the top is zero (as there is no motion).

So, kinetic energy after falling 10 metres = m g h

= 1 x 9.8 x 10

= 98 J

In practice, there will be air resistance so the kinetic energy will be less than this answer.

Explanation:

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