Jamb 1978
The force required to make an object of mass m travelling with a velocity v, turn in a circle of radius r is
A. mv²/r
B. mr²/v
C. mr/v
D. mv/r²
E. mv/r
ANSWER: Option A
EXPLANATION: You remember Centripetal force, right?
A centripetal force is a net force that acts on an object to keep it moving along a circular path and the formula to calculate it is mv²/r
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