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UPSC Civil Service Exam Questions

Q1:

A vehicle is moving up an incline when the driver applies its brakes and the vehicle retards at 0.5 m/s2. Then according to D'Alembert's principle

A inertia force will be directed in the direction of motion

B inertia force will be directed opposite to the direction of motion

C magnitude of the inertia force will depend on the angle of inclination

D magnitude of the inertia force will depend on coefficient of friction between the wheels and the road surface

ANS:A - inertia force will be directed in the direction of motion

Answer B is right when it has breaking action 100%.

Acceley = 0m/s^2.



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