Projectile motion and resistive forcesAQA A-Level Physics: Mind map

Exam questions on Projectile motion and resistive forces

1. A stone is thrown horizontally at 12 m s⁻¹ from the top of a vertical cliff that is 45 m above the sea. Ignore air resistance and take g = 9.81 m s⁻².
   Calculate the speed of the stone as it reaches the sea.2 marks
2. A football is kicked from level ground with a speed of 20 m s⁻¹ at 35° above the horizontal. Ignore air resistance and take g = 9.81 m s⁻².
   Explain why the speed of the ball is a minimum at the highest point of its flight.2 marks
3. A skydiver of mass 80 kg jumps from a stationary balloon and falls vertically. Her speed increases at first and she eventually reaches a constant terminal speed. Take g = 9.81 m s⁻².
   Explain, in terms of the forces on the skydiver, why her acceleration decreases and she reaches a terminal speed.3 marks