Why does the gravitational force on a satellite in a circular orbit change its velocity but not its speed?
The force acts in the same direction as the satellite is moving.
The force acts in the opposite direction to the satellite's motion.
The force acts at right angles to the direction the satellite is moving.
The force acts for too short a time to change the satellite's speed.
41 exam-style questions on AQA GCSE Physics 8.1 Solar system; stability of orbital motions; satellites, covering 8.1.1 Our solar system, 8.1.2 The life cycle of a star, and 8.1.3 Orbital motion, natural and artificial satellites. Each one has a worked solution and a mark scheme showing where the marks go.