A basket ball of radius `R` is spun with an angular. `vecomega=omegahatk` and its `CM` moves with a speed `v`. Find aerodynamic lift experienced by the ball. Assume `=` density of air.

A ball of radius r hits a cushion with a pure rolling motion and rebounds, with a pure rolling motion. Find the ratio of the height h of the cushion to the radius r of the ball. Assume that the foce exerted on the ball by the cushion is horizontal during the impact and that the ball hits the cushion normally.

A body moving with a constant speed v in a circle of radius r. its angular acceleration is :

A ball of radius R is uniformly charged with the volume density rho . Find the flux if the electric field strength vector across the balls section formed by the plane located at a distance r_(0) lt R from the centre of the ball.

A ball of mass m moving with speed v towards the right strikes a wall moving towards the left with speed u . Find the change in the K.E. of the ball if the collision is elastic.

A ball of mass m is thrown in air with speed v_(1) from a height h_(1) and it is at a height h_(2)(gth_(1)) when its speed becomes v_(2) . Find the work done on the ball the air resistance.

A ball of mass m is thrown in air with speed v_(1) from a height h_(1) and it is at a height h_(2)(gth_(1)) when its speed becomes v_(2) . Find the work done on the ball the air resistance.