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Physics Gcse > SP2f - Momentum > Flashcards

Flashcards in SP2f - Momentum Deck (9)
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1

What is momentum?

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

2

What does the momentum of an object depend on?

Mass and velocity

3

Is momentum a vector or a scalar?

Vector

4

How can your relate momentum, mass and velocity?

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

Also written as p = m x v

5

How can you calculate force related to momentum?

Force = (mv - mu)/t
Where v is the final velocity and u is the starting velocity

6

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

Force = (mv - mu) / t

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

7

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

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

8

What is conversation of momentum?

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

9

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

One is positive and one is negative