Question

A
body sliding
across a
surface does........
work​

Answer 1

Answer:

Explanation: Since the frictional force acting on a body sliding down acts in direction opposite to the direction of displacement of block, the work done is negative

Answer 2

Answer:

A body sliding across a surface does negative work.

Explanation:

A sliding body posseses frictional force which acts opposite to the motion of body hence work done turns out to be negative.