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In H.C.Verma physics-1 book they mentioned that “resultant force perpendicular to the velocity has no effect on speed , hence kinetic energy is not changed” , how ?
Yes,beacuse when resultant force is perpendicular to the velocity then,the Power that is:dot product of force and velocity would be zero.as the angle is 90 degree.Hence with zero Power there would be no effect on speed. and K.E remains constant.
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