Edexcel GCSE Combined Science CP2 Motion and forces overview quiz quiz

There is no difference between them; they always mean exactly the same thing

Speed is always a larger value than velocity for any moving object

Velocity is speed in a stated direction; speed has no direction

Velocity is a force and is measured in newtons

distance divided by the time taken

resultant force times the mass

mass times the gravity value

change in velocity / time

The acceleration

The distance travelled

The average speed

The resultant force

The acceleration of the object

The distance travelled

The resultant force

The mass

An object stays still or moves steadily unless a resultant force acts on it

Forces always come in equal and opposite pairs acting on different objects

Resultant force equals mass times acceleration (F = ma)

Weight equals mass multiplied by gravity

36 m/s2

9 m/s2

0.25 m/s2

4 m/s2

Mass is the amount of matter (kg); weight is the force of gravity (N)

They are the same thing and are always measured in exactly the same units

Mass is the force of gravity in newtons; weight is the amount of matter in kilograms

Weight stays exactly the same everywhere in the universe

0.4 N

40 N

4 N

400 N

Friction

Tension

Gravity

Air resistance

Only the braking distance while the brakes are applied

Only the thinking distance during the driver's reaction time

The car's speed multiplied by its mass

Thinking distance plus braking distance

Tiredness or distraction

Worn or badly faulty brakes

A wet and slippery road surface

Worn, smooth tyres

100 m/s2

4 m/s2

0.25 m/s2

25 m/s2