Pearson Edexcel International GCSE (9–1) · PHYSICS · Section
FORCES AND SHAPE
29 practice questions
Practice questions
21–29 of 29
Question 21
1 mark · Normal
Answer and check →Which one of the following quantities is a vector quantity?
- A.speed
- B.temperature
- C.force
- D.energy
Question 22
2 marks · Normal
Answer and see the solution →A box is pulled to the right with a force of 15 N and to the left with a force of 9 N. What is the resultant force acting on the box? State the size and the direction.
Question 23
3 marks · Normal
Answer and see the solution →Explain why friction is essential for a person to walk on the ground. What would happen if there were no friction between your shoes and the surface?
Question 24
3 marks · Normal
Answer and see the solution →A toy boat floats on a lake and is pulled forwards by a string with a force of 5 N. At the same time, water resistance acts on the boat with a force of 3 N in the opposite direction.
(a)[1 mark]Draw a labelled diagram showing all the forces acting on the boat. Indicate the directions clearly.
(b)[2 marks]Calculate the resultant force acting on the boat. State its direction.
Question 25
1 mark · Normal
Answer and check →Which of the following is not a type of force that can act on an object?
- A.Gravity
- B.Magnetism
- C.Temperature
- D.Upthrust
Question 26
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 27
4 marks · Hard
Answer and see the solution →A heavy box is pulled to the right along a rough surface by two ropes. Rope X pulls with 120 N and rope Y pulls with 80 N, both horizontally to the right. Friction acts to the left with a force of 150 N. The box experiences no other horizontal forces.
(a)[3 marks]Calculate the resultant horizontal force on the box. State its size and direction.
(b)[1 mark]Explain what will happen to the speed of the box as a result of this force.
Question 28
4 marks · Hard
Answer and see the solution →The diagram shows a metal block at rest on a horizontal table. Several forces act on the block. A downward force of 35 N acts on the block (its weight). The table exerts an upward force of 35 N (normal reaction).
(a)[2 marks]State and explain whether the forces on the block are balanced or unbalanced. Justify your answer using vector ideas.
(b)[2 marks]Describe what will happen to the block if an extra upward force of 10 N is applied to it.
Question 29
4 marks · Hard
Answer and see the solution →A student claims that temperature is a vector quantity. She says this because temperature can rise or fall, and you can measure how quickly it changes.
(a)[2 marks]Explain, with reasons, whether temperature is a vector or scalar quantity.
(b)[2 marks]Give two reasons why force is a vector quantity and not a scalar quantity.