3.5 - Motion - Newton's laws of motion and momentum

Question 1

What does it mean for an object to be in equilibrium ?

Answer 1

It is not accelerating and is either stationary or moving at a constant velocity

Question 2

What does Newton’s third law state ?

Answer 2

Every force has an equal and opposite reaction

Question 3

What is Newton’s second law ?

Answer 3

F = ma

Question 4

What is Newton’s first law ?

Answer 4

An object at rest or moving with constant velocity will stay that way unless a resultant force acts upon it
(inertia)

Question 5

What is an elastic collision ?

Answer 5

The kinetic energy before is equal to the kinetic energy afterwards so no energy is lost

Question 6

What is an inelastic collision ?

Answer 6

The kinetic energy at the end is not equal to the kinetic energy at the start with some of the energy being lost to the surroundings

Question 7

What is the momentum equation ?

Answer 7

Momentum = mass x velocity

Question 8

What is the rate of change of momentum also know as ?

Answer 8

Resultant force

Question 9

What is impulse

Answer 9

The change in momentum -
FΔt = Δ(mv)

Question 10

What is the equation for the principle of conservation of momentum ?

Answer 10

m1u1 + m2u2 = m1v1 + m2v2