A motor car is moving with a velocity of 108 km/h and it takes 4 s to stop after the brakes are applied. Calculate the force exerted by the brakes on the motor car, if the mass of the car
along with the passenger is 1000 kg.
Answers
Answered by
8
Answer:
force=7500N
Explanation:
Force=mass*acceleration
f=m×t (v-u)
f=1000× 4(0-108×5/18)/4
=1000×(−7.5)
∴f=−7500N
opposing force is denoted by negative sign.
Answered by
4
Answer:
7500N
Explanation:
u=108km/h
i.e)108×5/18 m/s
=30m/s
t=s
a=u/t
a=30/4=7.5m/s^2
We know that F=ma
:.F=1000×7.5=7500N
7500N
HOPE IT MAY HELP YOU
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