P2 1. Motion.

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Presentation transcript:

P2 1. Motion

1. Whenever two objects interact the forces they exert are... Equal Opposite Equal and opposite Larger as time increases

2. What is the resultant force? 5 15 30 5 N 15 N 10 N

3. The car is stopped at the traffic lights 3. The car is stopped at the traffic lights. What happens when the driving force is greater than the air resistance and friction? It continues moving It accelerates It moves backwards It stops

4. The car is driving at 40 mph down the road 4. The car is driving at 40 mph down the road. What happens when the driving force is equal to the air resistance and friction? It continues moving It accelerates It moves backwards It stops

5. Force is calculated from the following equation? mass x acceleration current x voltage energy / time distance / time

6. What does the gradient of a d-t graph give? Speed Force Energy Acceleration

7. What is the speed of the object between 12 and 16 seconds? 4 8 12

8. What is the difference between speed and velocity? Size Magnitude Direction No difference

9. What is the gradient of a v-t graph? Speed Force Energy Acceleration

10. What is the acceleration of the object between 12 and 16 seconds? 4 8 12

11. What does the area under a v-t graph tell us? Speed Distance Time Acceleration

12. What does the chart show? The greater the speed of an object the longer it takes to stop The greater the braking force , the longer it takes to stop The speed of an object is unrelated to the braking distance The longer the thinking time the faster the braking distance

13. What is the braking distance? The distance travelled after the brakes have been applied The total time it takes to stop The speed at which an object is travelling before the brakes are applied Thinking distance + braking distance

14. What does not affect the drivers reaction time? Tiredness Drugs Alcohol Ice on the roads

15. What is never an outcome for the kinetic energy of a moving vehicle when braking? It remains constant Transferred to heat in the wheel and brakes Converted into sound Heats up the road surface

16. What does not affect the braking distance? Road surface Weather conditions Vehicle condition Alcohol use

17. When a falling objects has no resultant force what happens? Stops accelerating Accelerates upwards Stops moving Decelerates