A wheelbarrow carries a load. The axle of the wheel is the pivot.
The weight of the load is 600 N and acts 0.40 m from the axle.
The handles are a further 0.80 m from the line of action of the load.
Ignore the weight of the wheelbarrow.
What is the smallest upward force on the handles that will lift the load?
150 N150\ \text{N}150 N
300 N300\ \text{N}300 N
200 N200\ \text{N}200 N
1800 N1800\ \text{N}1800 N
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.