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2.3 Forces in action

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Question 13
H

A hydraulic lift in a garage raises a car of mass 1500 kg.

The car rests on a large piston of area 0.050 m2. A small piston with a circular face of diameter 2.0 cm is pushed down to raise the car.

The gravitational field strength is 10 N/kg.

a.

Calculate the weight of the car.

[1]
b.

Calculate the pressure in the liquid needed to support the car.

[2]
c.

Calculate the force on the small piston needed to support the car.

[3]
d.

The small piston must move down a much greater distance than the large piston moves up.

Explain why.

[2]
Markscheme

2.3 Forces in action Questions

  1. GCSE
  2. /Physics
  3. /2.3 Forces in action

46 exam-style questions on OCR GCSE Physics 2.3 Forces in action, covering 2.3.1 Stretching, bending and compressing, 2.3.2 Elastic and plastic deformation, 2.3.3 Force and extension of a spring, 2.3.4 Linear and non-linear force-extension behaviour, 2.3.5 The spring constant, 2.3.6 Work done in stretching, 2.3.7 Gravitational fields, 2.3.8 Weight and gravitational field strength, 2.3.9 Acceleration in free fall, 2.3.10 Relating force, mass and gravitational field strength, 2.3.11 Forces causing rotation, 2.3.12 The moment of a force, 2.3.13 Levers and gears, 2.3.14 Pressure in fluids, and 2.3.15 Pressure, force and contact area. Each one has a worked solution and a mark scheme showing where the marks go.

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