Question

A motorcycle is traveling at a velocity of 5.0 m/s when a car swerves into its path. The driver breaks and it takes 3.0 seconds and a distance of 24 meters before the motorcycle comes to a complete stop. The mass of the motorcycle is 170 kg. How much work was done by the breaks to stop the motorcycle?

Answer 1

Work= Force*Distance. Force= Mass*Acceleration. Acceleration = change in velocity/change in time. So Acceleration =5/3. Force= 170*(5/3). Therefore Work=170*(3/5)*24. So your answer comes out to 2304 Joules.