Answer: The work done by the ramp against the force of gravity is -343 J
Explanation:
Work is defined as the force that is causing the movement or displacement of an object.
Mathematically,
\(W=F\times d\)
We know that:
\(F=m\times g\)
where,
W = work done by the ramp = ?
m = mass of the box = 7 kg
g = acceleration due to gravity = \(-9.8m/s^2\) (Negative sign appears because it is acting against the gravity)
d = displacement = 5 m
Putting values in above equation, we get:
\(W=7kg\times (-9.8m/s^2)\times 5m\\\\W=-343J\)
Hence, the work done by the ramp against the force of gravity is -343 J
