A motorcar 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 motorcar.
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Answer:
mass of the car(in kg) × 27 N
Step-by-step explanation:
F = ma
a= dv/ dt
when applied brakes, the velocity goes down to zero
a=108/4
a= 27m/s²
Force = mass of car × acceleration
= 27 × mass of the car (in kg) N.
note that without the mass provided force cannot be found.
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