Answer: 686 joules
Step-by-step explanation:
Given that,
mass = 10 kg
distance = 7 meter
Work done on the pail = ?
Recall that work is done when force is applied on an object over a distance.
i.e Work = Force x distance (h)
(since force = mass x acceleration due to gravity (g))
Work = mgh
Work = 10kg x 9.8m/s^2 x 7m
Work = 686 joules
Thus, 686 joules of work was done on the pail.