movement

• Mens & Natuur
• Middelbare school
• havo
• Leerjaar 2

You have to slow down on the bike, because of a red light.
What kind of movement is this?

1. uniform motion
2. accelerating motion
3. decelerating motion

A car starts driving at a traffic light.
What kind of movement is this?

1. uniform motion
2. accelerating motion
3. decelerating motion

A marathon runner runs at a constant speed.
What kind of movement is this?

1. uniform motion
2. accelerating motion
3. decelerating motion

Time (s)	0	0,1	0,2	0,3	0,4	0,5	0,6
Distance (m)	0	0,03	0,10	0,21	0,37	0,57	0,81

What distance has the ball
travelled in the first 0,5 seconds?

1. 0,03 m
2. 0,57 cm
3. 0,57 m
4. 0,81 m

Time (s)	0	0,1	0,2	0,3	0,4	0,5	0,6
Distance (m)	0	0,03	0,10	0,21	0,37	0,57	0,81

What distance has the ball

traveled between t=0,5s and

t=0,6s?

Antwoorden in de volgende dia.

What distance has the ball
traveled between t=0,5s and
t=0,6s? (In de vorige dia)

1. 0,81 m
2. 0 m
3. 0,57 m
4. 0,24 m

The formula

For constant speeds, we have the following formula:

v is the speed in meters per second (m/s)

s is the distance in meters (m)

t is the time in seconds (s)

v=​t​​s​​

Eliod Kipchoge

On October 12th 2019, Eliod Kipchoge became the first human to complete a marathon 

(42.195 km) in under 2 hours!

What was his average running

speed? 

Use 1 hour and 59 min as his

finishing time.

What was the average running
speed of Eliod Kipchoge?

10 m/s = ... km/h

1. 3,6
2. 36
3. 10 000
4. 2,8

What is the formula for the speed?

1. v = t/s
2. v = m/s
3. v = s/t
4. v = s*t

A graph of the speed

Constant speed, means that v stays the same all the time!

How much distance is travelled here in 90 seconds?  (Give answer on the next slide)

How much distance is travelled?

A graph of the speed

How can we do this here?

--> We use the average

       speed

How can we calculate the average speed here?

A graph of the speed

How can we do this here?

--> We use the average

       speed

How can we calculate the average speed here?

v​avg​​=​2​​v​init​​+v​final​​​​

This a image made with a stroboscope. The stroboscope flashes every 0,1 s. How much time has passed between the first and last image.

1. 0,5 s
2. 0,6 s
3. 0,7 s
4. 0,8 s

Here you see a stroboscopic image of a rubber ducky that has been thrown. Where will the ducky move the slowest?

1. When it is down
2. At the top
3. Everywhere the same

How do you calculate the stopping-distance?

1. Only reaction distance
2. Only the breaking distance
3. reaction distance minus breaking distance
4. reactie-distance + breaking distance

stopping distance is :

1. reaction distance
2. reaction distance + breaking distance
3. breaking distance

How many times larger is the breaking distance if the speed gets 5x larger ?
(breaking distance n²)

1. 10 x
2. 25 x
3. 5 x
4. stays the same

What is the breaking distance?

1. The distance the car travels before breaking
2. The distance the car travels while breaking
3. the total stopping distance.

How large is the reaction distance if you go 50 km/h ?

1. 50 m
2. 23.8 m
3. 13.8 m
4. No way to know

calculate the reaction distance with the help of the (v,t)-diagram.

1. 1,5meter
2. 40 meter
3. 60 meter
4. 220meter