Physics unit 2.1 (scalars and vectors

Scalars

Measurements that have size only

Vectors

Measurements that have magnitude and directions

examples of scalars

Time

distance

mass

speed

examples of vectors

Force

acceleration

velocity

displacment

what is the equation for speed

Speed (m/s)= distance (m) ÷ Time (s)

what is acceleration

Aceleration= change in velocity ÷ time taken

how do you calculate change in velocity

Final velocity - initial velocity

what is acceleration measured in

Rate of change of velocity m/s2

What dose each letter show

A: Constant speed-fast

B: Aceleration

C: Constant speed-slow

D: Stopped

E: Return to start-constant speed

how do you calculate gradient

Change in y ÷ change in x

What dose gradient show

The steepness

how do you show constant spped on a velocity time graph

Flat line at the speed

how do you show stationary on a velocity time graph

Flat line on zero

how do you show constant aceleration on a velocity time graph

Straight diagonal line up

how do you show constant deceleration on a velocity time graph

Straight diagonale line down

how do you show increasing aceleration on a velocity time graph

a upwards line with a curve in away from the x axis

how do you show decreasing aceleration on a velocity time graph

A upwards line in with the curve towards the x axis

how do you show increasing deceleration on a velocity time graph

A downwards line with a curve away from the x axis

how do you show on a velocity time graph

a downwards line with a curve in towards the x axis

how do you calculate stopping distance

Stopping distance= thinking distance + breaking distance

what factors affect thinking distance

Speed

Distractions

Tiredness

Alchol+ drugs

Medication

what factors affect breaking distance

Speed

Car issues

Mass of vehicle

Ice on the road

Other road conditions