1. a State Newton's third law of motion.
2. b** Comment on whether the following pairs of forces are examples of Newton's third law pairs.
- i** The gravitational force of the Moon on the Earth and the gravitational force of the Earth on the Moon
- ii** The weight of a book resting on a table and the normal contact force of the table on the book
- iii** The electrical force exerted by a proton on an electron in a hydrogen atom and the electrical force exerted by the electron on the proton
- iv** The force exerted by a raindrop as it hits the ground and the force of the ground on the raindrop