HideShow resource information
• Created by: SumSum.xo
• Created on: 25-04-16 20:01
What is the equation for Distance?
speed x time or average speed x time
1 of 18
On a distance time graph what does the gradient represent?
speed
2 of 18
What is the equation for acceleration?
change in speed divided by time taken
3 of 18
On a sped-time graph the gradient equals...
the acceleration
4 of 18
name all 6 forces
gravity (weight), reaction force, thrust, drag, lift and finally tension
5 of 18
when forces are unbalanced the object...
accelerates
6 of 18
what is the equation for force?
mass x acceleration
7 of 18
when the forces of an object are balanced it has reached it's...
terminal velocity
8 of 18
what does a crumple zone do to decrease the impact of a car crash?
the crumple zones crumple and change the shape of the car. This increases the time it takes for the car to stop, therefore reducing the impact
9 of 18
what is the equation for work done?
work done= force x distance
10 of 18
name three safety features of a car
seat belts, crumple zones and air bags
11 of 18
how do seatbelt work?
they stretch slightly which increases the time it takes for the driver/ seat belt wearer to stop. This reduces the impact on the chest, reducing the chances of injury
12 of 18
what is momentum?
the greater the mass of an object the greater it's velocity, which means it has a larger momentum. the equation is: momentum (kg m/s)= mass (kg) x velocity (m/s)
13 of 18
what causes a change in momentum?
The force that is acting on an object
14 of 18
what is thinking distance?
The distance the car travels between the driver seeing the hazard and placing their foot on the brakes
15 of 18
how is the thinking distance affected?
1. How fast you are traveling 2. Tiredness, drugs, alcohol, distractions and a lack of concentration
16 of 18
What is braking distance?
the distance the car travels after the brakes have been applied to the car actually stopping
17 of 18
what affects the braking distance?
1. Speed 2. The mass of the car 3. How good your brakes are.. are they worn down? 4. The grip of the surface e.g. icy roads
18 of 18

## Other cards in this set

### Card 2

#### Front

On a distance time graph what does the gradient represent?

speed

### Card 3

#### Front

What is the equation for acceleration?

### Card 4

#### Front

On a sped-time graph the gradient equals...

### Card 5

#### Front

name all 6 forces