# Explaining motion P4 Questions/Answers. Question 1 What is the name used to describe a pair of forces?

## Presentation on theme: "Explaining motion P4 Questions/Answers. Question 1 What is the name used to describe a pair of forces?"— Presentation transcript:

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

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

Question 3 Write down the equation to calculate speed.

Answer Speed = Distance / Time

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

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

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

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

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.

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

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

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