A ball in thrown from a roof top at an angle ${45}^{\circ }$ above the horizontal. It hits the ground a few second later. At what point during its motion, does the ball have greatest acceleration?

Q. (1)
A ball is thrown from a roof top at an angle of ${45}^{\circ }$ above the horizontal. It hits the ground a few seconds later. At what point during its motion, does the ball have greatest speed?

(2)
A ball is thrown from a roof top at an angle of ${45}^{\circ }$ above the horizontal. It hits the ground a few seconds later. At what point during its motion, does the ball have smallest speed?

(3)
A ball is thrown from a roof top at an angle of ${45}^{\circ }$ above the horizontal. It hits the ground a few seconds later. At what point during its motion, does the ball have greatest acceleration?

Q. From a top of building $19.6m$ high a a ball is projected horizontal after how long does it strike the ground if line joining the projection to the point where it hits the ground makes an $\angle {45}^{\circ }$ with horizontal what is velocity of ball?

Q. From the top of a building $80m$ high, a ball is thrown horizontally which hits the ground at a distance. The line joining the top of the building to the point where it hits the ground makes an angle of ${45}^o$ with the ground. Initial velocity of projection of the ball is $(g=10m/s^2)$

Q. From the top of a tower $19.6m$ high, a ball is thrown horizontally. If the line joining the point of projection to the point where it hits the ground makes an angle of $45$ with the horizontal, then the initial velocity of the ball is:

Q. A ball is thrown horizontally from the top of a tower with an initial velocity of 20 meters per second, what is the horizontal velocity of the ball as it hits the ground ?