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Forces quiz

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• 1. Forces
• 2. 1. The speed of a car is a measure of how:
• far it is travelling.
• fast it is travelling.
• long it is travelling.
• high it is travelling.
• 3. 2. A bus travelled a distance of 20 km in 2 hours. Its speed was:
• 0.1 km/h.
• 40 km/h.
• 20 km/h.
• 10 km/h.
• 4. 3. The mean speed of something is:
• its fastest speed.
• the total distance it travels divided by the time taken.
• its slowest speed.
• its speed limit.
• 5. 4. If a car travels at 50 mph, how long will it take to travel 75 miles?
• 1.5 hours
• 0.5 hours
• 0.67 hours
• 67 minutes
• 6. 5. Balanced forces:
• make objects speed up.
• make objects slow down.
• do not change the speed of moving objects.
• only affect stationary objects.
• 7. 6. This drawing shows two forces on a car. What will happen to the speed of the car?
• It will accelerate.
• It will slow down.
• It will decelerate.
• It will stay the same.
• 8. 7. What are forces X and Y?
• X is air resistance, Y is gravity.
• X is air resistance, Y is friction.
• X is gravity, Y is air resistance.
• X is friction, Y is air resistance.
• 9. 8. An object will accelerate quickly if it has:
• a large force and a small mass.
• a large force and a large mass.
• a small force and a large mass.
• a small force and a small mass.
• 10. Participant Scores 8 John McParland 8 Jamie Burrell 8 Jesper Van Marle 8 Luke Brett 8 Willem Jan Vos
• 11. 9. The air resistance of a car can be reduced by:
• making the car bigger.
• making the car heavier.
• giving it a streamlined shape.
• putting a roof rack on it.
• 12. 10. Which statement about air resistance is true?
• If speed increases, air resistance decreases.
• If speed increases, air resistance increases.
• If speed decreases, air resistance increases.
• Speed has no effect on air resistance.
• 13. 11. A car needs energy to keep moving because:
• everything needs a force to keep moving.
• gravity is trying to slow it down.
• it needs a force to balance friction and air resistance.
• weight balances friction.
• 14. 12. Air resistance on a moving object is caused by:
• air being attracted to the object.
• air particles moving around the object.
• the wind.
• air particles hitting the object.
• 15. 13. There are changing forces on a skydiver during a jump. Which of these statements is not true?
• Her weight stays the same.
• Her air resistance stays the same.
• Her air resistance is very small at the beginning of the jump.
• Her air resistance increases as her speed increases.
• 16. 14. A skydiver reaches a maximum speed when:
• his air resistance has increased to balance his weight.
• his air resistance has decreased to balance his weight.
• his weight has increased to balance the air resistance.
• his parachute opens.
• 17. 15. This distance–time graph shows Mrs Martin driving her children to the cinema. Which part of the graph shows where she stopped at some traffic lights?
• V to W
• W to X
• X to Y
• Y to Z
• 18. 16. This speed–time graph shows the speed of a skydiver. Which letter shows part of the graph where the forces on him are balanced?
• A
• B
• C
• D
• 19. Participant Scores 15 Charlotte De Grijs 14 Jamie Burrell 14 Jesper Van Marle 14 Leonie Eulderink 14 Eline Van den Haak