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Question

A force of 50 N is required to push a car on a level road with a constant speed of 10 m/s. The speed of the car is 500 kg . What is a force should be applied to make the car accelerate at 1 m/s2?

A
550 N
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B
450 N
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C
350 N
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D
650 N
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Solution

The correct option is A 550 N

Given,

Mass of car, M=500kg

Acceleration required, a=1ms2

A constant force 50N to get constant speed.

Therefore, friction force, f=50N

Required force = inertial force + friction force

F=ma+f

F=500×1+50=550N

Hence, required force is 550N


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