Topic 2 - Forces And Motion - Momentum

Question 1

What is the formula for momentum?

Answer 1

momentum = mass x velocity

P = mU, where P is momentum in kg·m/s, m is mass in kg, and v is velocity in m/s.

Question 2

What is always conserved in a collision?

Answer 2

Momentum

This applies when there are no external forces like friction or air resistance.

Question 3

In a collision, what is the relationship between total momentum before and after?

Answer 3

total momentum before = total momentum after

Question 4

What is the significance of momentum being a vector?

Answer 4

Momentum has both magnitude and direction

Question 5

What does Newton’s Second Law state regarding force and momentum?

Answer 5

Force = change in momentum / time

This can be expressed as F = ΔP / t.

Question 6

Fill in the blank: In collisions, each object will have momentum ______ and ______ the collision.

Answer 6

before and after

Question 7

What external forces can affect the conservation of momentum in a collision?

Answer 7

Friction, air resistance, electrostatic attraction

These forces can disrupt the conservation of momentum.