movements part 2: Types of movements, graphs and acceleration

• Physics

Movement Part 2

Types of movement

Graphs

Acceleration

Convert... 30 km/h = ... m/s

1. 8,3
2. 30
3. 108
4. 300

convert velocity

velocity is often given in km/h and must be converted to m/s

m/s               km/h

: 3,6

x 3,6

Which formula can you use to calculate the speed between 0 and 2 s?

1. vavg=​2​​(vstart+vfinal)​​
2. vavg=​t​​s​​
3. Both
4. None

Which formula can you use to calculate the speed between 3 and 8 s?

1. vavg=​2​​(vstart+vfinal)​​
2. vavg=​t​​s​​
3. Both
4. None

Types of motion - velocity

Acceleration	Uniform Acceleration	Uniform motion	Uniform deceleration	Deceleration
Speed increases by different steps ex. 0, 2 ,5, 10	Speed increases with the same steps ex. 0, 2 ,4 ,6	Speed remains the same	Speed decreases with the same steps ex. 10, 8, 6, 4	Speed decreases with different steps ex. 10, 8, 5, 1

Uniform

acceleration

Uniform motion 

Uniform

deceleration

no speed

no speed

Uniform

Acceleration

Acceleration

Deceleration

Uniform

Motion

Uniform

Deceleration

Calculating displacement

You can use the (v,t)-diagram 

to calculate distance

Distance = area under the graph

Calculate the distance travelled.

Calculate vavg

Calculating acceleration:

a - acceleration in m/s2

t - time in s

v - velocity in m/s

a=​Δt​​Δv​​

Δv=v​final​​−v​initial​​

v

a

t

A runner increases his velocity from 1,5 m/s to 2,3 m/s in 4 seconds. Calculate the acceleration.

1. 0,2
2. 0,4
3. 0,6
4. 3,2

A car uniformly acceleraties with 1,5 m/s2 from 0 to 12 m/s. Calculate the time this takes