Question

A MASS OF A MINUBUS WITH THE DRIVER IS 1 500Kg .ASSUME THAT THE PASSENGERS HAV AN AVERAGE MASS OF 50Kg EACH .THE DRIVER IS MOVING AT A SPEED OF 30m.s WHE HE NOTICES THAT THE TRAFFIC LIGHTS AHEAD TURNED TO RED .HE APPLIES A FORCE OF 9 000N ON THE BREAK PEDAL .HOW LONG WILL IT TAKE HIM TO STOP AND HOW FAR HE BE FROM THE TRAFFIC LIGHTS IF HE WERE TO STOP IN TIME?

Answer 1

DON'T KNOW -- HOW MANY PASSENGERS ARE THERE? HOW FAR FROM THE STOP LIGHT DOES HE APPLY THE BRAKES?

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But you know
F=ma, which will give you the acceleration
v = at, which will give you the stopping time
s = 1/2 at^2, which will give you the stopping distance.

Answer 2

physics