Question

A force acting on a 8 kg mass changes its velocity from 4 m/s to 3 m/s. Calculate the work done by the
force.

Answer 1

ANSWER:

Here, m= 8kg, u= 4m/s, v= 3m/s.

Work done= Change in Kinetic energy.

W= 1/2 mv² - mu² = 1/2m (v²-u²)

= 1/2 × 8 × (3-4) = 4 × (-1) = -4 J. Ans.

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Answer 2

♨ ANSWER:-

Refer the attachment.

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