Question

An average force of 100. newtons is used to pull back the string of a bow by 0.60 meter.

The arrow in the bow is released. What is its kinetic energy as it leaves the bow?

Answer 1

Answer: 60 joules

Explanation:

The amount of work done in pulling back the string of a bow

= FORCE * DISPLACEMENT

W = 100 * 0.60 = 60 J

The change in kinetic energy is the net work done.

Therefore,

W = k1 - k2 = k1

This implies that the work done is equal to the kinetic energy.