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  4. A body is acted upon by a constant force from time t=0 to a time t=T after which it does not experience any force. Which of the following graphs best represents the variation of the velocity of the body with time?

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Q. A body is acted upon by a constant force from time $ t=0 $ to a time $ t=T $ after which it does not experience any force. Which of the following graphs best represents the variation of the velocity of the body with time?

KEAMKEAM 2000

Solution:

Rate of change of velocity gives acceleration. When body is acted upon by a constant force, its velocity increases constantly with time, after which velocity is constant. Hence, acceleration is zero and particle does not experience any force.

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