Question

GRD 9 CBSE

A body of mass 2 kg is dropped in height of 4 metre. what is the kinetic energy when it hits the ground g is equal to 10 metre per square.

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Answer 1

Explanation:

v^2=u^2+2gs

v^2= 0+ 2×10×4

v^2= 80

K.E. = 1/2 × m× v^2

K.E.= 1/2× 2× 80

K.E. = 80 J

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