1) A ball is projected horizontally from the top of a cliff on the surface of the Earth with a speed of 40 m s^–1. Assuming that there is no air resistance, what will its speed be 3.0 s later?

2) In the figure below, a helicopter is flying with a constant horizontal speed 35.0 m s^–1 and 100 m above the ground and the tank is traveling with a constant horizontal speed 15.0 m s^–1 and is 550 m away from the helicopter.

Assuming at t = 0 s, the helicopter and the tank is at the above position, how many seconds later should the helicopter drop a bomb so that it will hit the tank? Ignore air resistance.

3) A projectile is launched at point O and follows the path OPQRS, as shown. Air resistance may be neglected.

Which statement is true for the projectile when it is at the highest point Q of its path?

4) A projectile is fired at an angle α to the horizontal at a speed u, as shown.

What are the vertical and horizontal components of its velocity after a time t? Assume that air resistance is negligible. The acceleration of free fall is g.

5) A motorcycle stunt-rider moving horizontally takes off from a point 1.25 m above the ground, landing 10 m away as shown.

What was the speed at take-off?