Question

1) Mention expression for equation of rotational motion, .
2) Obtain the relation between angular momentum and torque.​

Answer 1

Answer:

1A, Equations of rotational motion,

(i)ω=ω0+at

(ii)θ=ω0t+ 1/2at^2

(iii)ω^2=ω0^2+2aθ

2A, Relation between torque and angular momentum is given by

rrnet =dL /dt

where,

r→ torque acting on a body

L→ angular momentum of body

Now if,

L= constant

So,

dL/dt=0

⇒rnet=0

Hence,

If a body is rotating with constant angular momentum then, the net torque on the body will be zero.