CH 4 Question 1

Question

Question 1:  A 2-kg ball is fired from a cannon. What is the ball’s change in kinetic energy when it accelerates from 5 m/s to 10 m/s? Show your calculations and give the final answer (change in kinetic energy) accompanied with appropriate units.

Answer 1

Kinetic energy (E_K) is calculated from:

E_K = (1/2)mv²

The change in kinetic energy is E_K2 - E_K1

For E_K2, use v = 10

For E_K1 use v = 5

For "m", use m = 2

The units will be "joules"