Answer: 98000J
Explanation:
Mass of small car (m) = 500 kg
Distance moved (h) = 20 m
work done by the braking force = ?
Work is done when force is applied on an object over a distance, hence Workdone = force x distance
(since force is the product of mass (m) and acceleration due to gravity (g), where g is 9.8m/s2)
Thus, Workdone = mgh
Workdone = 500 kg x 9.8m/s2 x 20 m
= 98000J
Thus, the work done by the braking force is 98000 joules
