A jet-powered speed boat uses up its fuel during a race, causing its lap times to decrease. The lap times decrease because:
the acceleration of the boat increases.
the drag forces on the boat decrease.
the maximum speed of the boat increases.
the hull becomes worn, reducing the friction with the water.
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.