SP2f - Momentum

Question 1

What is momentum?

Answer 1

A measure of how hard it is to stop an object moving

Question 2

What does the momentum of an object depend on?

Answer 2

Mass and velocity

Question 3

Is momentum a vector or a scalar?

Answer 3

Vector

Question 4

How can your relate momentum, mass and velocity?

Answer 4

Momentum = mass x velocity
Kg m/s. Kg M/s

Also written as p = m x v

Question 5

How can you calculate force related to momentum?

Answer 5

Force = (mv - mu)/t

Where v is the final velocity and u is the starting velocity

Question 6

A 2000kg car accelerates from 10m/s to 25m/s in 10 seconds. What resultant force produced this acceleration?

Force = (mv - mu) / t

Answer 6

2000 x 25 - 2000 x 10 / 10 = 3000 N

Question 7

When two moving objects collide, what can you say about their momentum?

Answer 7

It is the same before and after they collide (as long as no external force acts upon it).

Question 8

What is conversation of momentum?

Answer 8

The total momentum of two objects is the same before a collision as it is after as long as no external forces act upon them

Question 9

How do you know two objects are travelling opposite each other by looking at their momentum?

Answer 9

One is positive and one is negative