A comet in deep space approaches and passes near a massive planet.
What effects can the gravitational force between the planet and the comet have on the comet's motion?
It can alter the direction of the comet, slow it down, or speed it up.
It can alter the direction of the comet, or speed it up, but not slow it down.
It can alter the direction of the comet, or slow it down, but not speed it up.
It can slow down the comet, or speed it up, but not alter its direction.
183 exam-style questions on CIE IGCSE Physics 1.5.1a Forces, resultant force and motion. Each one has a worked solution and a mark scheme showing where the marks go.