Question

To avoid an accident, a driver with a mass of 60 kg applies his brakes and decelerates from 30 m/s to 1 m/s in 2 seconds. how much force was absorbed by his seat belt?

Answer 1

When brakes are applied, force absorbed by his seat belt was  870 N.

What is force?

The force is an action of push or pull in order to move or stop the body.

Given is the mass m=60 kg, velocity changes from v1 =30m/s to v2= 1m/s in time t=2s.

The acceleration is the time rate of change of velocity.

a = v1 -v2 /t

a =30 -1 /2

a = 14.5 m/s²

According to the Newton's second law of motion, the force absorbed by belt was

F =ma

F =60 x 14.5

F = 870 N.

Thus, force absorbed by his seat belt was 870 N.

Learn more about force.

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