Question

A student pushes a 40-N block across the floor for a distance of 10 m. How much work was applied to move the block? A. 4 J B. 40 J C. 400 J D. 4000 J

Answer 1

Answer: The correct answer is option(B).

Explanation:

Force applied on the block = 40 N

Displacement of the block = 10 m

Work done is defined as product of force applied on an object into displacement of an object.

Work done = $Force\times Displacement$

Work done to move the block:$40 N\times 10 m= 40 N m=40 Joules$

40 Joules of work was applied to move the block . Hence, the correct answer is option (B).