Pearson Edexcel International GCSE (9–1) · PHYSICS · Section
Pressure under a Solid
16 practice questions
Practice questions
11–16 of 16
Question 11
3 marks · Normal
Answer and see the solution →A metal plate rests on soft ground. The plate has a weight of 600 N and covers an area of 0.75 m².
(a)[2 marks]Calculate the pressure the plate exerts on the ground. Give your answer in Pa.
(b)[1 mark]Explain how the pressure would change if the area of the plate were halved, but the weight stayed the same.
Question 12
2 marks · Normal
Answer and see the solution →Explain, using the pressure equation, why a sharp knife is easier to use for cutting than a blunt knife.
Question 13
3 marks · Normal
Answer and see the solution →Describe a practical method for measuring the pressure that a student's shoe exerts on the ground.
Question 14
1 mark · Normal
Answer and see the solution →Which of these will result in the greatest pressure exerted on the ground?
Force (N) Area (m²) 400 0.5 250 0.2 800 2.0 120 0.1 - A.400 N, 0.5 m²
- B.250 N, 0.2 m²
- C.800 N, 2.0 m²
- D.120 N, 0.1 m²
Question 15
2 marks · Normal
Answer and see the solution →A gardener stands on soft ground with both feet, exerting a total force of 700 N downwards. The combined area of both boots in contact with the ground is 0.36 m². Calculate the pressure exerted on the ground. Give your answer to 2 significant figures.
Question 16
4 marks · Normal
Answer and see the solution →A rectangular block of wood has a mass of 4.5 kg. It is placed flat on the ground so that it touches the floor with its largest face. The area of this face is 0.3 m².
(a)[1 mark]Calculate the weight of the block. (Take g = 10 N/kg.)
(b)[2 marks]Calculate the pressure the block exerts on the ground. Give the unit.
(c)[1 mark]If the block is stood on its smallest face of area 0.05 m², calculate the new pressure exerted on the ground.