revision what force keeps the satellite orbiting the earth.? (1)
TRANSCRIPT
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REVISION
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What force keeps the satellite orbiting the Earth.? (1)
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Why is the Moon’s speed constant but it's velocity changing (2)
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Calculate the work done climbing the stairs (explain your answer)
Weight = 50 N Height 3 m
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A lift goes up two floors, each 3m high in 10 seconds Calculate the power.
Load = 2000N
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Will the car speed up / slow down / or travel at constant speed ? (1)
600 N 600 N
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How does the speed of falling objects change as they fall? (2)?
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Name two advantages of hybrid cars over cars with only petrol engines
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Will the car speed up / slow down / or travel at constant speed ? (1)
750 N 600 N
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B
A
CD
Where is PE increasing ?
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Describe how the forces change during a fall (before the parachute opens) (3)
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B
A
CD
Where is KE increasing and PE decreasing ?
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Explain how air bags reduce accidents? (3)
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Explain how ABS works.
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B
A
CD
Where as the car got the most KE – Explain your answer ?
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Some cars run on biofuel. Name an advantage and disadvantage of this fuel and what type of
emissions does it reduce??
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What will the effect of doubling the mass of a vehicle have on its KE and what will the effect of doubling its speed have?
2000 Kg 4000kg
10 m/s 20 m/s
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Both have the same engine and mass. So why does the car use less petrol if driven in the same manner