An inflated football is pressed against a player's flat hand. At the small region where the ball touches the hand, which describes the force exerted by the gas inside the ball on the inside surface of the ball?
It acts along the inside surface, outwards towards the edge of the contact region.
It acts at a slant to the inside surface, towards the player's hand.
It acts at right angles to the inside surface, away from the gas.
It acts at right angles to the inside surface, towards the gas.
108 exam-style questions on Edexcel GCSE Physics 14.3 Gas pressure and temperature, covering 14.3.1 Gas pressure and particle motion, 14.3.2 Temperature and pressure at constant volume, 14.3.3 Absolute zero and the kelvin scale, 14.3.4 Compressing and expanding gases, 14.3.5 Volume and pressure at constant temperature, and 14.3.6 Doing work on a gas. Each one has a worked solution and a mark scheme showing where the marks go.