Movement Part 1: Velocity

• Physics

Movement

Velocity

Acceleration and deceleration

- The distance between the pictures increases 

   but the time remains the same, therefore there is

   an acceleration

Acceleration: The velocity increases

Deceleration: The velocity decreases

v	v start	v final	v avg
		. . . .

Speed at a certain time

Speed at the end

Speed at the beginning

The middle of the different speeds during a certain time

Average Speed

What is speed?

The distance coverd in a certain amount of time.

v

s

t

/

average velocity

time

spatium

avg

Variable	Unit 1	Unit 2
Time	seconds (s)	hours (h)
Distance	meters (m)	kilometers (km)
Velocity	meter per second (m/s)	kilometer per hour (km/h)

Converting km/h to m/s

1 m / s =

Converting km/h to m/s

1 m / s =

1 m / 1 s =

Converting km/h to m/s

1 m / s =

1 m / 1 s =

0,001 km / 1 s =

Converting km/h to m/s

1 m / s =

1 m / 1 s =

0,001 km / 1 s =

0,001 / (1: 3600)h =

Converting km/h to m/s

1 m / s =

1 m / 1 s =

0,001 km / 1 s =

0,001 / (1: 3600)h =

3,6 km/h

Converting km/h to m/s

So for m/s to km/h you multiply by 3,6

For km/h to m/s you divide by 3,6

Calculate Average Speed

vavg=​2​​vstart+vfinal​​

Make sure you fill in the v in the same way! It is m/s OR km/h!

Which formula can you use to calculate the average speed of the whole movement shown in the graph?

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

Which formula can you use to calculate the average speed of the whole movement shown in the graph?

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

Which formula can you use to calculate the speed between t2 and t3?

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

Which formula can you use to calculate the speed between 0 and t2?

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

Find:
Vstart en Vfinal for A
Vavg for C
v at 7 seconds