Question

in a test of safety restraint,atest car was slowed from 50m/sec to rest in atime of 0.40s a)what acceleration was this.b)how did tje car travel in this time

Answer 1

initial v = 50 m/s
final v = 0m/s
time =0.40s
acceleration = v-u/t
= 0-50/0.40
=-50/0.40=1250m per sec sq

Answer 2

Answer:B

V=50m^s

U=0

T=0.4

=50×0.4+1/2×0.8

=20+25×0.8

=10m