Which produces the greater change in kinetic energy: exerting a 10-N force for a distance of 5m, or exertinga 20-N force over a distance of 2m? Assume that all the work goes into K.E.

Question

Which produces the greater change in kinetic energy: exerting a
10-N force for a distance of 5m, or exertinga 20-N force over a
distance of 2m? Assume that all the work goes into K E

Elena Gupta · Accepted Answer

In case I:
work done = f*s
= 10*5
= 50 J
In case II:
work done = f*s
=20*2
= 40 J
So the work done in case I is more Hence the K E of it will also be
greater