Question

A rigid body of mass m is moving on circular path of radius r & with a constant speed v, net force on body is F, then during half rotation work done by F is,

• A. F(2r)
• B. F(r$\sqrt{2}$)
• C. F$\left(\pi r\right)$
• D. zero

Answer 1

The correct option is D zero

Since speed = constant, K.E.=constant

so, $W_F=0$