Question

Rick's car has a mass of 1000 kg and its brakes can apply 8000 N of force. If he is driving at 32 m/s and sees something in the road suddenly, how long will it take his car to come to a stop? Use the equation below to help you.

Answer 1

Answer:

Given:

m=1000kg

F=8000 N

u=32m/s

v=0m/s

Required:

T=?

Solution:

F=m × a

8000N = 1000kg × a

a = 8m/s^2

Since it's deceleration -8m/s^2

a= v - u / t

-8m/s^2 = 0 - 32m/s / T

T = 4 s

Hence the car takes 4sec to stop

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