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Explaining motion P4

This resource covers fundamental questions and answers related to motion in physics, exploring interaction pairs of forces, calculations of speed, momentum, and work done. Key topics include the principles of constant speed, acceleration, and graph representations of distance-time and speed-time relationships. Learn the correct equations, such as speed = distance/time, and understand the implications of object mass on motion. This guide is ideal for students looking to grasp essential concepts in motion dynamics.

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Explaining motion P4

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  1. Explaining motionP4 Questions/Answers

  2. Question 1 • What is the name used to describe a pair of forces?

  3. Answer • Interaction pair

  4. Question 2 • Which of these are not true about interaction pairs of forces? • A) always equal in size • B) opposite in direction • C) act on different objects • D) one of them is always friction

  5. Answer • Answer D – one of them is always friction.

  6. Question 3 • Write down the equation to calculate speed.

  7. Answer • Speed = Distance / Time

  8. Question 4 • If car has travelled 3000m in 100 minutes what is its speed in m/min and m/s?

  9. Answer • 30m/min and • 0.5m/s

  10. Question 5 • Sketch a distance time graph to show a car starting from stationary, travelling at a constant speed and then stopping.

  11. Answer distance time

  12. Question 6 • Sketch a speed time graph to show a car accelerating, then travelling at a constant speed, then slowing down to stop.

  13. Answer Speed Time

  14. Question 7 • Describe what is happening during the journey in this velocity time graph. 10 mph time velocity

  15. Answer • The object is travelling at a velocity of 10mph then begins to slow down, it stops for a moment (intersection on x axis) then goes backwards.

  16. Question 8 • TRUE or FALSE • If two objects have different masses, the heavy one moves faster than the light one?

  17. Answer • FALSE the heavier object moves slower than the light one.

  18. Question 9 • Calculate the momentum of a lorry of a mass 5000kg travelling at 2m/s.

  19. Answer • 10000kg m/s

  20. Question 10 • Calculate the work done by a man pushing a car 25m along a road if he pushes with a force of 600N

  21. Answer • 15000J

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