Lesson 3.4.1.4
3.4.1.4 Projectile motion Quiz: AQA Physics, Unit 4
20 questions
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Lesson 3.4.1.4, Projectile motion: 20 multiple choice questions for the AQA Physics (7408), Unit 4: Mechanics and materials, written with Revision Ninja.
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The 20 questions
-
In projectile motion without air resistance, what happens to the horizontal velocity?
- It decreases to zero
- It increases steadily
- It equals the vertical velocity
- It is constant
-
What is the vertical acceleration of a projectile in a uniform gravitational field?
- g/2, downwards
- g, upwards
- g, downwards
- zero
-
What shape is the path of a projectile without air resistance?
- a hyperbola
- a parabola
- a circle
- a straight line
-
How does air resistance vary with speed?
- It is constant at all speeds
- It decreases as speed increases
- It is zero above a threshold speed
- It increases as speed increases
-
What is terminal speed?
- The speed at which the object stops
- The speed at which drag balances weight so the acceleration is zero
- The maximum speed of the Earth
- The speed at which drag is zero
-
In what direction does drag act on a moving object?
- In the direction of motion
- Perpendicular to motion only
- Vertically downwards only
- Opposite to the direction of motion
-
Which statement describes friction qualitatively?
- It acts in the direction of motion
- It opposes relative motion between surfaces
- It increases with decreasing contact
- It is always zero for rough surfaces
-
A ball is thrown horizontally at 10 m/s from a cliff 20 m high. Taking g = 10 m/s^2, how long until it lands?
- 1.4 s
- 2 s
- 1 s
- 4 s
-
For the ball in the previous case, what horizontal distance does it travel?
- 40 m
- 20 m
- 10 m
- 5 m
-
A projectile is launched at 20 m/s at 30 degrees to the horizontal. What is its horizontal velocity component?
- 10 m/s
- 23 m/s
- 17 m/s
- 20 m/s
-
For the projectile in the previous case, what is the time of flight on level ground, taking g = 10 m/s^2?
- 0.5 s
- 4 s
- 1 s
- 2 s
-
A projectile has initial vertical velocity 10 m/s with g = 10 m/s^2. What is its maximum height?
- 5 m
- 2.5 m
- 20 m
- 10 m
-
What is the resultant force on a falling object when it reaches terminal speed?
- equal to its drag
- zero
- increasing steadily
- equal to its weight
-
How does air resistance affect the range of a projectile?
- It increases the range
- It has no effect on the range
- It only affects the horizontal velocity by increasing it
- It reduces the range and the maximum height
-
Why does a vehicle have a maximum speed?
- Drag increases with speed until it balances the driving force
- Its engine loses power at high speed only
- Its mass increases with speed
- Friction becomes zero at high speed
-
A ball is thrown horizontally at 5 m/s from a table 1.25 m high. Taking g = 10 m/s^2, how far horizontally does it travel before landing?
- 0.5 m
- 1.25 m
- 5 m
- 2.5 m
-
Two balls are released from the same height at the same instant. One is dropped and one is launched horizontally. Ignoring air resistance, which lands first?
- The horizontally launched ball lands first
- The dropped ball lands first
- They land at the same time
- It depends on their masses
-
At what launch angle does a projectile have maximum range on level ground without air resistance?
- 90 degrees
- 30 degrees
- 45 degrees
- 60 degrees
-
How does air resistance make the descent of a projectile differ from its ascent?
- The path is unaffected
- The descent is steeper and the path is asymmetric
- The descent is faster than ascent by a fixed amount
- The descent is shallower and the path is symmetric
-
A projectile has vertical component 15 m/s. Taking g = 10 m/s^2, how long does it take to reach its highest point?
- 3.0 s
- 15 s
- 0.75 s
- 1.5 s
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