Projectile motion quiz

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1. A ball is thrown up into the air.

ball-top-of-flight

Which of the following best describes the direction of the overall force on the ball at the highest point of the motion?

Down

Forwards

Zero

2. A ball is thrown up into the air.

ball-mid-flight

Which of the follow best describes the direction overall force on the ball half way to the top of the motion?

Down

Forwards

Zero

Three projectiles, A, B, and C, are fired from the same machine on the moon (where there is no air resistance) with the same initial speed.

Their paths are labelled A, B, and C.

At the three points marked 2 (as the projectile is about to hit the ground) which projectile will be travelling fastest?
A or B or C, or will all be equally fast?

projectile_path

Path A

Path B

Path C

All be equal in speed.

At the three points marked 1 (the top of the flight), which projectile will be travelling the fastest?
A or B or C, or will all be equal in speed?

All are travelling at the same speed.

5. A human cannonball is fired at a speed of 25 m/s at an angle of 50°.

human_cannonball

What is the maximum height that he reaches?

18.3 m

19.2 m

25.0 m

32.6 m

6. A human cannonball is fired at a speed of 25 m/s at an angle of 50° and lands at the same height as launch. How long is he in the air for?

1.9 s

2.5 s

3.8 s

5.0 s

7. A human cannonball is fired at a speed of 25 m/s at an angle of 50° and lands at the same height as launch. What is horizontal distance that he travels?

32 m

50 m

61 m

95 m

8. A ball is kicked horizontally at a speed of 10 m/s off a 15 m high embankment to the ground below.

Online ball kick of cliff

At what angle does the ball hit the ground?

30°

45°

56°

60°

9. A ball is kicked horizontally at a speed of 10 m/s off a 15 m high embankment to the ground below.

Online ball kick of cliff

At what speed does the ball hit the ground?

10 m/s

20 m/s

27.3 m/s

30 m/s

10. A golfer hits a ball at speed of 20m/s at angle of 25° above the horizontal. The ball heads towards a fence 28m away.

At what height does the ball hit the fence?

Golf projectile

1.5 m

3.0 m

4.5 m

6.0 m

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