Answer:
Gravity force
Step-by-step explanation:
We are given that
Mass of wooden block,m=1.85 kg
We have to find the force which do non zero work on the block as it slides down the ramp.
When a block slides down the ramp on a frictionless surface .
Then, weight act on the wooden block in downward direction.
We know that weight is that force which act on the body due to gravity.
Then, we can say that the force which do nonzero work on the block as it slides down the ramp is gravity force.