Altriy IB Nemon's silfin aw of moton 1. State Newton's third law of motion in words. Identify the action and reaction forces, and explain what bappens in, each situation: 2.1 A bullet is fired and the gun recoils. 2.2 An apple falling freely from a tree. 2.3 A book at rest on a table. 2.4 A tennis ball bounces a ainst the floor.

For every action, there is an equal and opposite reaction. This means that for every force exerted by one object, another object exerts a force of the same magnitude but in the opposite direction. 2.1 When a bullet is fired, the gun exerts a forward force on the bullet (action), and the bullet exerts an equal backward force on the gun (reaction), causing it to recoil. 2.2 As an apple falls, it experiences the downward force of gravity (action) and, simultaneously, the apple pulls upward on the Earth with an equal force (reaction), although the effect on the Earth is imperceptible due to its immense mass. 2.3 A book resting on a table exerts a downward force due to its weight (action), while the table exerts an equal upward normal force on the book (reaction), keeping it stationary. 2.4 When a tennis ball bounces against the floor, the ball exerts a downward force on the floor (action), and the floor exerts an equal upward force on the ball (reaction), propelling it back into the air.