If the angular momentum of a body is found to be zero about a point is it necessary that it will also be zero about a different point?

When is the work done on the body said to be zero ?

If the angular momentum of the body is increased by 50%, its rotational kinetic energy is increased by …………

The vector sum of a system of non-collinear forces acting on a rigid body is given to be non-zero. If the vector sum of all the torques due to the system of forces about a certain point is found to be zero, does this mean that it is necessarily zero about any arbitrary point?

If the displacement of a body is zero is the distance covered by it necessarily zero ? Explain with suitable illustration.

Obtain tau=Ialpha from angular momentum of rigid body.

When does the magnitude of angular momentum will be zero?

Show that the angular momentum about any point of a single particle moving with constant velocity remains constant throughout the motion.

A simple pendulum of mass m and length L is held in horizontal position. If it is released from this position, then find the angular momentum of the bob about the point of suspension when it is vertically below the point of suspension.

A particle of mass m has been thrown with intial speed u making angle theta with the horizontal ground. Find the angular momentum of the projectile about an axis perpendicular to the plane and passing through the point of projection when the projectile is (a) At the highest point (b) About to hit the ground