<u>Answer:</u> The work done by the ramp against the force of gravity is -343 J
<u>Explanation:</u>
Work is defined as the force that is causing the movement or displacement of an object.
Mathematically,
We know that:
where,
W = work done by the ramp = ?
m = mass of the box = 7 kg
g = acceleration due to gravity = (Negative sign appears because it is acting against the gravity)
d = displacement = 5 m
Putting values in above equation, we get:
Hence, the work done by the ramp against the force of gravity is -343 J