A Force is Applied on a Body of Mass 20 Kg Moving with a Velocity of 40 Ms−1. the Body Attains a Velocity of 50 Ms−1 In 2 Seconds. Calculate the Work Done by the Body.

Question

A force is applied on a body of mass 20 kg moving with a velocity of 40 ms⁻¹. The body attains a velocity of 50 ms⁻¹ in 2 seconds. Calculate the work done by the body.

Numerical

Solution

Work done, W =`1/2` m (v₂² − v₁²)

=`1/2xx20(50^2-40^2)`

= 9000 J

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Concept of Work

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