# Physics unit 2 FORCES

HideShow resource information
• Created by: Lucycp101
• Created on: 29-11-15 15:41
How do you calculate speed?
Speed = distance/time
1 of 18
What is momentum?
The quantity of motion an object has
2 of 18
What is the momentum equation?
Momentum = velocity x mass
3 of 18
What are velocity,mass and momentum's units?
momentum = kg m/s Mass = kg Velocity = m/s
4 of 18
What is the law of momentum?
The total momentum before an event = The total momentum after the event
5 of 18
What happens if the direction is going a different way? (left)
We add a negative charge to the answer
6 of 18
What is the thinking distance?
How far the car travels before the driver reacts
7 of 18
What is the breaking distance?
How far the car travels when the breaks are applied
8 of 18
What is the stopping distance?
The breaking distance + The stopping distance
9 of 18
Name 4 factors affecting the reaction time
Tiredness,drugs,distraction and drinking
10 of 18
Name 4 factors affecting breaking distance
Weather, speed, worn out tires and faulty breaks on the car
11 of 18
What is the more specific term in physics for 'faster'?
More kinetic energy
12 of 18
What is the unit for weight?
Newtons
13 of 18
Does weight change depending on where you are in the solar system?
Yes
14 of 18
Does mass change depending where you are?
No
15 of 18
What is weight?
A type of force
16 of 18
What is acceleration measured in?
m/s squared
17 of 18
How can you tell when ticker timers are getting faster?
The dots are further apart from eachother
18 of 18

## Other cards in this set

### Card 2

#### Front

What is momentum?

#### Back

The quantity of motion an object has

### Card 3

#### Front

What is the momentum equation?

### Card 4

#### Front

What are velocity,mass and momentum's units?

### Card 5

#### Front

What is the law of momentum?