Question

a car is initially moving with the speed of 30 M per second it comes to rest in 3 seconds after applying brakes calculate its ID acceleration and distance covered by car in 3 seconds

Answer 1

hey your ans is here
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given
u=30
v=0(as it comes to rest)
t=3
a=v-u/t
a=0-30/3
a=-10m/s2

2) v2=u2+2as
(0)2=(30)2+2×(-10)×s
0=900-20s
s=45m
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hope it helps!