Question

A car of mass 1200 kg is moving with a constant speed of 36km/h. The net force acting on the car is

Answer 1

Answer:

The force applied by the breaks is 3000 N.

Explanation:

Here, m=1200 kg u=36*(1000/3600)m/s = 10 m/s

v=0 m/s and s=20 m

v^2-u^2=2as

0-(10)^2=2a(20)

-100=2a(20)

-5=2a

therefore, a=-2.5 m/s^2

We know that F=ma

Therefore, F=1200*(-2.5)

F= -3000 N

The force applied by the breaks is 3000 N.

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