Hi,

Can anybody help me with the following as I am totally stuck! A truck is moving at 88 km h-1 and breaks to 52km h -1. What is the distance over which the breaks are used if the deceleration was 2.82 m s -2.

I have to use one or more of the following equations - and correct SI units. I have been told to think about the energies involved. Any help will be gratefully received.

Ek = 1/2mv^2

W = Fd

P = E/t