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Net Force

Consider a ve...

Question

Consider a vehicle going on a horizontal road towards east. Neglect any force by the air. The frictional forces on the vehicle by the road.

A

is towards east if the vehicle is accelerating

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B

is zero if the vehicle is moving with a uniform velocity

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C

must be towards east

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D

must be towards west

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Solution

The correct options are
C is towards east if the vehicle is accelerating
D is zero if the vehicle is moving with a uniform velocity
When the vehicle accelerating, to oppose the rotational torque the friction force should act towards east. For uniform velocity the friction is zero.

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