Question

on turning a corner a motorist rushing at 44m/s finds a child on the road 100m ahead. He instantly stops the engine and applies the brakes so as to stop it within 1 m of the child. calculate time required to stop it.

Answer 1

u=44m/s

v=0m/s

s=100-1=99m

v^2-u^2=2as

-44^2=2 x a x 99

-1936=2 x 99 x a

a = -9.77m/s^2

v=u+at

0=44-9.77t

t=4.50sec

Answer 2

Explanation:

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