Question

work done in linear motion is defined by W=F.ds , what is it's analogue in rotational motion ?




plz plz plz plz plz don't spam ​

Answer 1

Answer:

Rotational Analogue of force in linear motion is torque.

τ

=

r

×

F

Force is necessary for a body to do translational motion. Similarly it is the torque which is required to rotate a body. If net torque applied on the body about the axis of rotation is zero, then the body doesnot rotate.

Answer 2

Answer:

Now that we have determined how to calculate kinetic energy for rotating rigid bodies, we can proceed with a discussion of the work done on a rigid body rotating about a fixed axis. (Figure) shows a rigid body that has rotated through an angle dθdθ from A to B while under the influence of a force →FF→. The external force →FF→ is applied to point P, whose position is →rr→, and the rigid body is constrained to rotate about a fixed axis that is perpendicular to the page and passes through O. The rotational axis is fixed, so the vector →rr→ moves in a circle of radius r, and the vector d→sds→ is perpendicular to →r.