A ball is thrown from a roof top at an angle of `45^@` above the horizontal. If hits the ground a few second later. At what point during its motion , does the ball have
Greatest acceleration?

A ball is thrown from a roof top at an angle of 45^@ above the horizontal. If hits the ground a few second later. At what point during its motion , does the ball have Greatest speed.

A ball is thrown from a roof top at an angle of 45^@ above the horizontal. If hits the ground a few second later. At what point during its motion , does the ball have Smallest speed.

A ball is thrown straight up. What is its velocity ad acceleration at the highest point?

A ball is thrown up with a speed of 9.8 ms^-1 What the acceleration due to gravity at the top most point.

A small sphere rolls down without slipping from the top of a track in a vertical plane. The track has an elevated section and a horizontal part is 1.0 m above the ground level and the top of the track is 2.4 m above the ground. Find the distance on the ground with respect to the point B (which is vertically ) below the end of the track as shown in figure. Where the sphere lands. During its flight as a projectile does the sphere continue to rotate about its centre of mass? Explain.