Question

I driver takes 0.20sec to apply the brakes the
is daiving Car at a speed of 54km/h and the brake
cause a deceleration of 6.0 ms? Find the distance
travelled by the car after he sees the need to
but the brakes.​

Answer 1

v^2-u^2=2as

0-400=2×(-6)×s

s=100÷3

s=33.33

Answer 2

t=0.20sec

u=54m/s

a=-6.0m/s

S=ut+1/2atsq.

=54×0.20+1/2×-6×0.20sq.

=10.8+-0.12

=10.68m