Question

a car is travelling at 72 km/have and when the brakes are applied it experiences a uniform retardation of 2m/s.how long does it take the car to stop and how far does it travel from the instant the brakes are applied??

Answer 1

hey miss
here is ur answer
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v=u+at
v^2-u^2=2as.
Here v=0 as finally car has to stop.
u=72 km/h or 20 m/s.
a=-2 m/s^2(retardation)
Solving above 2 equations give
t=10s
s=100m.
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I hope this will help
#Prem✌✌✌

Answer 2

by the equation of motion