Explain how is a cat able to land on its feet after a fall taking advantage of the principle of conservation of angular momentum ?

State the principle of conservation of angular momentum.

How does an ice-skater, a ballet dancer or an acrobat take advantage of the principle of conservation of angular momentum ?

If the earth suddenly contracted to half of its present radius without losing any mass, how many hours would there be in a day? (hint: Apply the principle of conservation of angular momentum).

An acrobatora balletdancer is able to change his her angular speed with the help of law of conservation of angular momentum. How?

Assertion : When two equal masses undergo a glancing elastic collision with one of them at rest then after the collisioin, they will move at 90^(@0 to eachtoerh. Reason : It follows from the principle of conservation of linear momentum .

The mass of the earth is increasing at the rate 1 part in 5 xx 20^(19) per day by the accretion of meteors falling normally upon the earth's surface. Find the corresponding rate of change of the period of rotation of the earth supporting the earth to be a sphere of uniform density. [Hint: Consider the deposit as a spherical shell and apply principle of conservation of angular momentum]

A girl sits on a rolling chair, when she stretch her arms horizontally, her speed is reduced. Principle of conservation of angular momentum is applicable in this situation.

Assertion : Even when orbit of a satellite is elliptical, its plane of rotation passes through the centre of earth. Reason: According to law of conservation of angular momentum plane of rotation of satellite always remin same.