A diver stands still at the end of a diving board. The board bends. The other end of the board is bolted to a support.
Explain why the board would not bend if it was not bolted to the support.
After the diver jumps off, the board returns to its original shape.
Name the type of deformation of the board.
State the acceleration of the diver in free fall.
The diver has a mass of 60 kg. The board is 3.0 m above the water. The gravitational field strength is 10 N/kg.
Use the equation: gravitational potential energy=mass×gravitational field strength×height\text{gravitational potential energy} = \text{mass} \times \text{gravitational field strength} \times \text{height}gravitational potential energy=mass×gravitational field strength×height
Calculate the gravitational potential energy transferred as the diver falls from the board to the water.
A heavier diver says:
'I will fall with a greater acceleration because my weight is greater.'
Ignore air resistance.
Explain why the diver is wrong.
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.