John and Jack are trying to pull a cart full of stones. Calculate the work done by them if they could displace the cart through a distance of 100cm.
I. 400 J
II. 200 J
III. 20000 J
IV. 40000 J
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Given info : John and Jack are trying to pull a cart full of stones. they could displace the cart through a distance of 100 cm. force applying by them is 400 N.
To find : The work done by them is ..
solution : work done by them to displace the cart = force applied by them × displacement of cart
= 400 N × 100 cm
= 400 N × 1 m
= 400 Nm
= 400 J [ ∵ 1 Nm = 1 J]
Therefore the work done by them is 400 J. option (I) is correct choice.
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