Projectile motionEdexcel International A Level Physics: Flashcards
What these 13 flashcards ask
- What is a projectile?
- What is the horizontal acceleration of a projectile?
- What is the vertical acceleration of a projectile?
- Which quantity links the horizontal and vertical motion of a projectile?
- Which reaches the ground first: a ball dropped or an identical ball projected horizontally from the same height?
- How do you find the time of fall for a horizontally launched projectile?
- How do you find the horizontal range?
- How are the components of a launch velocity u at angle θ found?
- What is the vertical velocity at the highest point of a projectile's path?
- What is the horizontal velocity at the highest point?
- What is the time of flight on level ground for a vertical launch component uy?
- How do you find the speed of a projectile at any instant?
- What is the maximum height of a projectile on level ground?
Exam questions on Projectile motion
- A ball is kicked horizontally at 12 m s⁻¹ from the edge of a flat roof that is 20 m above level ground. Air resistance is negligible and the acceleration of free fall is 9.81 m s⁻².Calculate the vertical component of the ball's velocity just before it hits the ground.2 marks
- A footballer kicks a ball from level ground with an initial speed of 20 m s⁻¹ at 30° above the horizontal. Air resistance is negligible and the acceleration of free fall is 9.81 m s⁻².Calculate the time the ball is in the air before it returns to the ground.2 marks
- A footballer takes a free kick 20 m from the goal line, kicking the ball with an initial speed of 18 m s⁻¹ at 35° above the horizontal. The crossbar of the goal is 2.44 m above the ground. Air resistance is negligible and the acceleration of free fall is 9.81 m s⁻².Calculate the horizontal and vertical components of the initial velocity of the ball and the time taken for the ball to travel 20 m horizontally.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).