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10 minutes maximum! Can you do it in 5?
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1. What are the correct units for force?
- A. joules
- B. newtons
- C. watts
- D. m/s
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2. Which of these is the correct formula linking force and acceleration?
- A. force = mass x acceleration
- B. acceleration = mass x force
- C. force = weight x acceleration
- D. acceleration = weight x force
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| 3. What force is needed to make a 2kg firework rocket accelerate at 4 m/s2? |
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- A. 0.2 N
- B. 2 N
- C. 4 N
- D. 8 N
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4. A 100g toy car uses an electric motor that produces a force of 3 N. What is the car's acceleration?
- A. 30 m/s2
- B. 300 m/s2
- C. 3 m/s2
- D. 0.3 m/s2
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| 5. When the astronaut Buzz Aldrin first stood on the Moon, he could feel a difference in the pull of gravity. Which statement is correct? |
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- A. He was weightless.
- B. His mass was now zero.
- C. His mass was the same but his weight was less.
- D. His weight was the same but his mass was less.
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6. Which of these statements give the correct description and unit for mass and weight?
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Mass (unit) |
Weight (unit) |
A |
Pull of gravity (N) |
amount of matter (kg) |
B |
Pull of gravity (kg) |
amount of matter (N) |
C |
amount of matter (N) |
Pull of gravity (kg) |
D |
amount of matter (kg) |
Pull of gravity (N) |
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7. Which of these is the correct formula linking mass and weight?
- A. weight = mass x gravitational field strength ( W = m.g )
- B. weight = mass ÷ gravitational field strength ( W= m/g)
- C. mass = gravitational field strength x weight ( m = g.W )
- D. mass = gravitational field strength ÷ weight ( m = g/W )
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8-10. Different planets have different strengths of gravity. Rocks on the surface may be easier or harder to lift up.
What are the missing values in the table below? |
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Planet |
Gravitational Field Strength (N/kg)
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Mass of rock (kg) |
weight (N) |
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Mars |
4 |
8 |
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| 9. |
Earth |
10 |
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1000 |
| 10. |
Mercury |
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240 |
888 |
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