Question

write the expression for torque acting on a body in rotational motion

Answer 1

- revolution of planets around the sun
- revolution of moon around the earth
- runner runs in circular track

Answer 2

in rotational moving body force is inacting towards the center.

if a body of weight m is moving with the speed v in circle of radius r

then force acting towards center is

F=mv∧2/r

as we know torque is resultant of force and distance between acting force and place then torque,

= F * d

= mv∧2/r *d