10 questions🇬🇧English
🎯 Projectile Motion – A-level
Physics · A-level — practises resolving velocities, time of flight, range and maximum height of projectiles
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Questions
A ball is thrown at an angle and reaches its highest point. Ignoring air resistance, what is its acceleration there?
9.81 m s⁻² vertically upwards
9.81 m s⁻² along its direction of motion
9.81 m s⁻² vertically downwards
Zero, because it is momentarily at rest
20s
From the same height, ball A is dropped as ball B is fired horizontally. Ignoring air resistance, which lands first?
Ball B lands first
Ball A lands first
It depends on ball B's speed
Both land at the same time
20s
A ball is launched at 20 m s⁻¹ at 30° above the horizontal. What is the vertical component of its initial velocity?
10 m s⁻¹
20 m s⁻¹
17.3 m s⁻¹
11.5 m s⁻¹
30s
Ignoring air resistance, why is the path of a projectile a parabola?
x is linear in t, while y is quadratic in t
Gravity acts along the direction of motion
Horizontal and vertical speeds stay equal
Both x and y increase linearly with t
30s
A stone is thrown horizontally at 15 m s⁻¹ from a 20 m high cliff. Take g = 10 m s⁻². How far from the base does it land?
15 m
20 m
30 m
60 m
60s
A ball is kicked at 30 m s⁻¹ at 30° above level ground. Take g = 10 m s⁻². What is its time of flight?
6.0 s
1.5 s
3.0 s
5.2 s
60s
A projectile has an initial vertical velocity of 20 m s⁻¹. Take g = 10 m s⁻². What maximum height does it reach?
10 m
20 m
40 m
2 m
30s
On level ground with no air resistance, a ball launched at 25° has range R. At what other angle, same speed, is the range also R?
35°
65°
75°
50°
30s
Compared with its path in a vacuum, how does air resistance change a thrown ball's trajectory?
Lower, shorter, with a steeper descent than ascent
Lower, shorter, with a steeper ascent than descent
Same height, but a shorter range
Lower, shorter and still symmetrical
30s
A ball is thrown horizontally at 8 m s⁻¹ and falls for 0.6 s. Take g = 10 m s⁻². What is its speed at that moment?
6 m s⁻¹
14 m s⁻¹
8 m s⁻¹
10 m s⁻¹
60s