Pearson Edexcel International GCSE (9–1) · PHYSICS · Unit
Forces and Motion
367 practice questions
Topics covered
Practice questions
101–110 of 181 · Normal
Question 101
3 marks · Normal
Answer and see the solution →A cyclist is moving at a steady speed along a straight road.
(a)[1 mark]Name the two horizontal forces acting on the cyclist.
(b)[2 marks]Explain, using ideas about balanced forces, why the cyclist moves at a constant speed.
Question 102
3 marks · Normal
Answer and see the solution →A metal wire is stretched by attaching weights. The original length of the wire is 50.0 cm. With a 10 N force, the length becomes 50.8 cm.
(a)[1 mark]Calculate the extension of the wire.
(b)[2 marks]If the extension is proportional to the force for this wire, what would its length be when a 25 N force is applied?
Question 103
3 marks · Normal
Answer and see the solution →Rubber bands are often used to hold objects together. When you stretch a rubber band, you notice that the extension does not increase evenly as you add more force.
(a)[2 marks]Explain how the force-extension graph for a rubber band would look different to the graph for a metal spring.
(b)[1 mark]Give one reason why a rubber band does not obey Hooke’s law.
Question 104
3 marks · Normal
Answer and see the solution →A student is asked to describe the elastic behaviour of different materials.
(a)[1 mark]What does it mean if a material behaves elastically?
(b)[2 marks]Give an example of a material that shows elastic behaviour and one that shows plastic behaviour.
Question 105
4 marks · Normal
Answer and see the solution →A student investigates how extension varies with force for a metal wire. Their setup uses a half-metre rule, clamp stand, and a set square to improve measurement accuracy.
(a)[2 marks]Describe two ways the student can ensure the measurements of the wire's extension are accurate in this investigation.
(b)[2 marks]Explain why the spring or wire should not be stretched beyond its elastic limit during this experiment.
Question 106
2 marks · Normal
Answer and see the solution →A spring has an original length of 14.6 cm. When a force of 3.5 N is applied, the length of the spring increases to 16.1 cm. Calculate the extension of the spring produced by the force. Give your answer in centimetres.
Question 107
2 marks · Normal
Answer and see the solution →Explain what is meant by the elastic behaviour of a material. Give an example of when this property is useful in everyday life.
Question 108
1 mark · Normal
Answer and check →Which statement best describes the force-extension graph for a metal spring obeying Hooke’s law?
- A.It is a horizontal line.
- B.It is a straight line passing through the origin.
- C.It is a curve that increases at higher forces.
- D.It is a straight line that does not pass through the origin.
Question 109
4 marks · Normal
Answer and see the solution →A student pulls a cart of mass 8.0 kg along a smooth surface. The cart accelerates at 2.5 m/s^2.
(a)[1 mark]State the equation linking force, mass, and acceleration.
(b)[2 marks]Calculate the unbalanced force applied to the cart.
(c)[1 mark]Explain what would happen to the acceleration if the mass of the cart was halved, assuming the same force is applied.
Question 110
3 marks · Normal
Answer and see the solution →A skateboarder of mass 60 kg pushes off the ground and accelerates at 0.80 m/s^2. Calculate the resultant force acting on the skateboarder. Show your working.