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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 ?

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 ?

Grade:11

1 Answers

Vikas TU
14149 Points
7 years ago
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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