1.

A particle (bob) of mass `1` kg is performing vertical cicular motion. Then `:` A. Power delevered by tension at point `(4)` is negative.B. Power delevered by tension at point `(2)` is positive.C. Power delivered by gravitational force at point (3) is zero.D. Power delivered by gravitational force at point (4) is negative.

Answer» Correct Answer - D
`P=vec(F).vec(v)` Tension is always perpendicular to velocity


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