Pearson Edexcel International GCSE (9–1) · PHYSICS · Chapter
Units (Solids, Liquids and Gases)
69 practice questions
Topics covered
Practice questions
21–30 of 69
Question 21
1 mark · Easy
Answer and check →Which of these objects would exert the greatest pressure on a soft surface if the force is 350 N for each case?
- A.A 0.5 m² shoe
- B.A 0.2 m² boot
- C.A 1.0 m² flat board
- D.A 2.0 m² mattress
Question 22
2 marks · Easy
Answer and see the solution →A book with a weight of 40 N rests on a flat table. If the area of contact is 0.08 m², calculate the pressure the book exerts on the table.
Question 23
2 marks · Easy
Answer and see the solution →Give two changes that would increase the pressure exerted by a person standing on the ground.
Question 24
2 marks · Easy
Answer and see the solution →A student places a brick weighing 60 N flat on the ground.
(a)[1 mark]The area of contact is 0.15 m². Calculate the pressure exerted by the brick on the ground.
(b)[1 mark]If the student stands the brick on its end, the area of contact becomes 0.05 m², but the weight is unchanged. Explain what happens to the pressure and why.
Question 25
1 mark · Normal
Answer and see the solution →State the equation linking pressure, force, and area for pressure under a solid. Use standard symbols.
Question 26
3 marks · Normal
Answer and see the solution →A wooden block of mass 5.0 kg rests on a flat table. The contact area between the block and the table is 0.20 m^2.
(a)[1 mark]Calculate the weight of the block. (Take g = 10 N/kg)
(b)[2 marks]Calculate the pressure exerted by the block on the table. Give your answer in pascals (Pa).
Question 27
2 marks · Normal
Answer and see the solution →Explain why a drawing pin can be pushed into wood much more easily than a thumb, even if the same force is applied.
Question 28
3 marks · Normal
Answer and see the solution →A metal object with a flat base is placed on the ground.
(a)[2 marks]The object exerts a force of 180 N over a contact area of 0.060 m^2. Calculate the pressure on the ground.
(b)[1 mark]State the SI unit for pressure.
Question 29
3 marks · Normal
Answer and see the solution →Describe a method you would use in the laboratory to determine the pressure exerted by a shoe on the ground. Include details of the measurements you would take.
Question 30
1 mark · Normal
Answer and check →Which of the following would increase the pressure exerted by a box on the floor, assuming its weight stays the same?
- A.Increasing the contact area of the box with the floor
- B.Placing a heavier object on top of the box
- C.Decreasing the contact area of the box with the floor
- D.Using a rough surface for the floor