Question

A circular ring of mass m and radius a, lies on a smooth ... Insect of mass m, resting on it starts and walks round it with uniform velocity v relative to the ring. Show that the centre of the ring describes a circle m v with angular velocity

Answer 1

Answer:

The angular momentum of mass about center will remain constant as the torque of tension is zero.

mv

∘

r

∘

=mv

′

2

r

∘

v

′

=2v

∘

Final value of K.E.=

2

1

m(2v

∘

)

2

=2mv

∘

2