A body of 2 kg falls from rest. What will be its kinetic energy during – InterviewSolution

1.

A body of 2 kg falls from rest. What will be its kinetic energy during the fall at the end of 2s?

Answer»

Mass of body = 2 kg

Initial velocity, u = 0

Time taken, t = 2 s

Acceleration due to gravity, g = 10 m/s²

Final velocity, v = ?

Using the first equation of motion,

v = u + gt = 20 m/s

KE = 1/2 mv²= 400 J

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