Solids, Liquids and Gases
4 marks · EasyA block with a weight of 30 N stands on a platform of area 0.015 m².
State the formula for pressure under a solid, using symbols.
Calculate the pressure the block exerts on the platform. Give the unit.
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
(a) p = F / A
(b) 2000 Pa
Show mark scheme and worked solution
Marking points
B1 (a) · 1 mark · States correct formula in symbols: p = F / A.
M1 (b) · 1 mark · Substitutes correct values for F and A. (follow-through)
M2 (b) · 1 mark · Performs calculation: 30 / 0.015. (follow-through)
A1 (b) · 1 mark · Final answer with correct unit: Pa. (follow-through)
Worked solution
a) The formula is p = F / A.
b) Substitute the values: p = 30 N / 0.015 m² = 2000 Pa.