Pressure under a solid
2 marks · Normal| Object | Force (N) | Area (m^2) |
|---|---|---|
| A | 500 | 2.0 |
| B | 400 | 1.0 |
| C | 800 | 4.0 |
| D | 900 | 3.0 |
Which object exerts the greatest pressure on the ground? Show how you decided.
Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.
Show answer
B exerts the greatest pressure (pressure = 400 N / 1.0 m^2 = 400 Pa).
Must show: Comparison calculation for all objects, Stating object with highest value
Common mistakes: Choosing highest force or smallest area only
Show mark scheme and worked solution
Marking points
B1 · 1 mark · Correctly calculates pressure for at least two objects.
B2 · 1 mark · Correctly identifies object with highest pressure (B).
Worked solution
Pressure for each object: A: 500/2.0 = 250 Pa, B: 400/1.0 = 400 Pa, C: 800/4.0 = 200 Pa, D: 900/3.0 = 300 Pa. Object B exerts the greatest pressure (400 Pa).