Which force, together with the weight of the submarine (the gravitational force of the Earth on the submarine), makes a pair according to Newton's third law of motion?
the upward buoyant force (upthrust) exerted on the submarine by the surrounding seawater
the downward force exerted by the submarine's hull on the surrounding seawater
the gravitational force exerted by the submarine on the Earth
the downward water pressure force acting on the upper surface of the submarine
84 exam-style questions on AQA A Level Physics Force, energy and momentum, covering Scalars and vectors, Moments, Motion along a straight line, Projectile motion, Newton's laws of motion, Momentum, Work, energy and power, and Conservation of energy. Each one has a worked solution and a mark scheme showing where the marks go.