Hmmm.
energy lost= original energy-finalenergy
= 1/2 m (18^2-3^2)
The rider sees a traffic queue ahead. He applies the brakes and reduces the speed of the
motorbike from 18 m/s to 3 m/s.
Use the equation in the box to calculate the kinetic energy lost by the motorbike.
1 over 2× mass × speed
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