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