Question

A car with 2000 kg goes from zero to 30 m/s. How much work was done (in joules) to increase the cars speed?

Answer 1

Explanation:

The work done is equal to the increase in Kinetic Energy

KE = 1/2 m v^2

= 1/2 (2000 kg) ( 30 m/s)^2 = 900 000 J