Projectile motionEdexcel A-Level Physics: Flashcards
What these 13 flashcards ask
- What is a projectile?
- What does independence of horizontal and vertical motion mean?
- What is the horizontal acceleration of a projectile when air resistance is negligible?
- What is the vertical acceleration of a projectile?
- How do you find the time of fall of a horizontally launched object?
- How do you find the range of a horizontally launched object?
- How do you resolve a launch velocity u at angle θ above the horizontal?
- What is the vertical velocity at the highest point?
- What is the time of flight on level ground for launch speed u at angle θ?
- What shape is the path of a projectile when air resistance is ignored?
- How do you find the speed of a projectile at any time?
- How does air resistance change a real trajectory compared with the ideal one?
- A ball is dropped and another is fired horizontally from the same height. Which lands first?
Exam questions on Projectile motion
- A stone is thrown horizontally at 12 m s⁻¹ from the top of a vertical cliff 45 m high, over the sea. Air resistance may be ignored.Calculate the speed of the stone as it reaches the sea.2 marks
- A footballer kicks a ball from level ground at 20 m s⁻¹ at 30° above the horizontal. Air resistance may be ignored.Calculate the time for which the ball is in the air before it returns to the ground.2 marks
- A rescue aircraft flies horizontally at a constant 60 m s⁻¹ at a height of 180 m. It releases a supply package which falls to the ground. Air resistance may be ignored.Calculate the time taken for the package to reach the ground.3 marks
Written by the Exaim team, led by Shaun Daswani (Head of Upper Secondary, Improve ME Institute; MSc Financial Mathematics, Imperial College London; BSc, UCL) and Jason Daswani (operational lead, Improve ME Institute; LSE).