Fig. 3.1 illustrates two children in equilibrium on a seesaw. A seesaw is a wooden plank that turns around a central pivot.
(a(i))[1]
Explain why the seesaw rotates clockwise.
(a(ii))[3]
Calculate the mass of the backpack.
(b(i))[1]
Define impulse.
(b(ii))[3]
Explain how the rubber floor lowers the child’s injury. Use ideas about impulse, force, momentum and time in your answer.
Worked solution & mark scheme
This 8-mark question has a full step-by-step worked solution and mark scheme. One marking point: “The clockwise moment increases (with no change in the anticlockwise moment)” …