A car is travelling at 40m/s. The driver sees an emergency ahead and 0.5s later slams on the brakes. The acceleration of the car is -4m/s^2.
a)What distance will the car travel before it stops
b)If the driver was able to apply brakes instantaneously without a reaction time, over what distance would the car stop?
c)Calculate the difference in your answers to (a) and (b)
d) Assume now that the car was travelling at 30m/s instead. Without performing any calculations, would the answer to (c) now be less than,equal to or larger than before? Explain your answer

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a)
Firmula is
v^2=u^2+2*a*s

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