AS: Laws of Motion

Question 1

Define Newton’s Law of Inertia (Law 1)

Answer 1

A body will continue in a state of rest or uniform velocity unless acted upon by an external or unbalanced force

Question 2

Define Newton’s Law of Acceleration (Law 2)

Answer 2

A body’s rate of change in momentum is proportional to the size of the force applied and acts in the same direction as the force is applied

Question 3

Define Newton’s Law of Reaction (Law 3)

Answer 3

Every action force applied to a body has an equal and opposite reaction force

Question 4

Apply Newton’s 1st Law to a conversion in rugby

Answer 4

The ball will remain at rest on the tee until an external force is applied (the player’s foot)

Question 5

Apply Newton’s 2nd Law to a conversion in rugby

Answer 5

The greater the force applied to the ball by the foot of the player, the greater rate of change in momentum

Question 6

Apply Newton’s 3rd Law to a conversion in rugby

Answer 6

A forward and upward action is applied to the ball by the player’s foot so the ball exerts an equal backwards and downwards force to the player’s foot