Answer: 60 of the boxes
Step-by-step explanation:
Work is said to be done if force is applied to move a body over a distance.
Work done = Force × distance
Workdone by Jill to move a box = 12×5 = 60Joules
Power is the rate of workdone in a specific time. It is measured in Joules/sec
Power = Work done/Time
60=60/time
Time = 60/60
Time=1 second
This means that it took Jill 1second to move a box.
If it takes 1second to move a box using a power of 60watts, this means Jill will move 60boxes in a minute (60seconds) using the same power.