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 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 Smallest speed.

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.

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 player throws a ball upwards with an initial speed of 29.4 m s^-1 :- What are the velocity and acceleration of the ball at the highest point of its motion ?

A rain drop of radius 2 mm falls from a height of 500 nr above the ground. It falls with decreasing acceleration (due to viscous resistance of the air) until at half its original height, it attains its maximum (terminal) speed, and moves with uniform speed thereafter. What is the work done by the gravitational force on the drop in the first and second half of its journey ? What is the work done by the resistive force in the entire journey if its speed on reaching the ground is 10 m s^-1 ?