Newton’s Laws Of Motion And Momentum

Question 1

State Newton’s first law

Answer 1

Every body continues in a state of rest or uniform motion (constant velocity in a straight line), unless it is acted on by a resultant force

Question 2

State Newton’s second law

Answer 2

The rate of change of momentum of a body is proportional to the resultant force and takes place in the direction of the force

Question 3

State Newton’s third law

Answer 3

When one body exerts a force on another, the other body exerts an equal and opposite force on the first body

Question 4

Define the newton

Answer 4

One newton is defined as the force, which gives a mass of 1 kilogram an acceleration of 1 metre per second per second in the direction of the force

Question 5

Show Newton’s second law using equations

Answer 5

F = ma

and a = Δv/Δt

so F = Δmv/Δt

Question 6

State the equation for impulse of a force

Answer 6

Impulse = FΔt

Question 7

What is the area under a force/time graph equal to?

Answer 7

Impulse of a force