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Forces quiz

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Forces quiz

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