A man moves on a straight horizontal road

Question:

A man moves on a straight horizontal road with a block of mass $2 \mathrm{~kg}$ in his hand. If he covers a distance of 40 in with an acceleration of $0.5 \mathrm{~m} / \mathrm{s}^{2}$, find the work done by the man on the block during the motion.

Solution:

$F=m a$

$W=F \cdot d$

$W=1 \times 40$

$W=40 \mathrm{~J}$

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