Brakes are applied to a car moving with disengaged engine, bringing it to a halt after 2s. Its velocity at the moment when the breaks are applied if the coefficient of friction between the road and the tyres is 0.4 is
Answers
Answered by
1
Answer:
01.54
Explanation:
please mark me brainlist answer
please
Answered by
1
Answer:
The car comes to rest and therefore the final velocity is zero.
The Force acting on the car is :
Force = mg × coefficient of friction
Force = 10m × 0.4 = 4m
F = ma
4m = ma
a = 4
From the following equation of motion :
V = u - at
0 = u - (4 × 2)
0 = u - 8
u = 8
The initial velocity is :
= 8 m/s
Explanation:
Similar questions