# Velocity

5.2 Velocity
Red slides are important do make sure you take notes!
1 / 29
Slide 1: Tekstslide
Physics

In deze les zitten 29 slides, met interactieve quizzen en tekstslides. Lesduur is: 30 min

## Onderdelen in deze les

5.2 Velocity
Red slides are important do make sure you take notes!

#### Slide 1 -Tekstslide

Basic information
There are 4 kinds of velocity which we work with in year 2.
The velocity always has the symbol v in formula's.

#### Slide 2 -Tekstslide

Types of velocity
Truus is going to race on her bycicle against Jeroen.
When the starting signal sounds Truus accelerates from a standstill and cycles at a velocity of 8 km/h. Then she goes down a hill, as a result she accelerates to 12 km/h. When she goes over the finish line she has a velocity of 10 km/h. After the finish het smart watch says her overal speed was 9 km/h.

#### Slide 3 -Tekstslide

Types of velocity
Truus is going to race on her bycicle against Jeroen.
When the starting signal sounds Truus accelerates from a standstill and cycles at a velocity of 8 km/h. Then she goes down a hill, as a result she accelerates to 12 km/h. When she goes over the finish line she has a velocity of 10 km/h.  After the finish het smart watch says her overal speed was 9 km/h.
Vstart
Vfinal
V
V
Vavg

#### Slide 4 -Tekstslide

v
vstart
vfinal
vavg
.
.
.
.

Speed at a certain time
Speed at the end
Speed at the beginning
The middle of the different speeds during a certain time

#### Slide 5 -Sleepvraag

Types of velocity
v = the velocity at a certain time during a movement
vstart = the velocity at the beginning of the movement
vfinal = the velocity at the end of the movement
vavg = the average velocity of the whole movement.

#### Slide 6 -Tekstslide

Calculating vavg
vavg can be calculted with two formula's;
The first one can always be applied

vavg=ts

vavg=ts
Symbol
Name
Unit
vavg
Average velocity
m/s
s
Distance
m
t
time
s

vavg=ts
Symbol
Name
Unit
vavg
Average velocity
km/h
s
Distance
km
t
time
h

#### Slide 9 -Tekstslide

vavg = s / t
The formula for s becomes;
A
s = vavg/ t
B
s = vavg x t
C
s = t / vavg
D
s= t x vavg

#### Slide 10 -Quizvraag

vavg = s / t
The formula for t becomes;
A
t = vavg/ s
B
t = vavg x s
C
t = s / vavg
D
t = s x vavg

#### Slide 11 -Quizvraag

Converting km/h to m/s
1 m / s =

#### Slide 12 -Tekstslide

Converting km/h to m/s
1 m / s =
1 m / 1 s =

#### Slide 13 -Tekstslide

Converting km/h to m/s
1 m / s =
1 m / 1 s =
0,001 km / 1 s =

#### Slide 14 -Tekstslide

Converting km/h to m/s
1 m / s =
1 m / 1 s =
0,001 km / 1 s =
0,001 / (1: 3600)h =

#### Slide 15 -Tekstslide

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

#### Slide 16 -Tekstslide

vavg=2vstart+vfinal
The second formula can only be used if you want to know the average speed of one type of movement (only an acceleration, decelaration or uniform motion)

#### Slide 17 -Tekstslide

Symbol
Name
Unit
vavg
Average velocity
m/s
vstart
Velocity at the beginning of the movement
m/s
vfinal
Velocity at the end of the movement
m/s
vavg=2vstart+vfinal

#### Slide 18 -Tekstslide

vavg = vstart + vfinal / 2
The formula for vstart becomes;
A
vstart = vavg / 2 - v final
B
vstart = vavg x 2 - v final
C
vstart = vavg / 2 + v final
D
vstart = vavg x 2 + v final

#### Slide 19 -Quizvraag

vavg = vstart + vfinal / 2
The formula for vfinal becomes;
A
vfinal= vavg / 2 - vstart
B
vfinal = vavg x 2 - vstart
C
vfinal= vavg / 2 + vstart
D
vfinal = vavg x 2 + vstart l

#### Slide 20 -Quizvraag

Which formula can you use to calculate the average speed of the whole movement shown in the graph?
A
vavg=2(vstart+vfinal)
B
vavg=ts
C
Both
D
None

#### Slide 21 -Quizvraag

Which formula can you use to calculate the average speed of the whole movement shown in the graph?
A
vavg=2(vstart+vfinal)
B
vavg=ts
C
Both
D
None

#### Slide 22 -Quizvraag

Which formula can you use to calculate the speed between t2 and t3?
A
vavg=2(vstart+vfinal)
B
vavg=ts
C
Both
D
None

#### Slide 23 -Quizvraag

Which formula can you use to calculate the speed between 0 and t2?
A
vavg=2(vstart+vfinal)
B
vavg=ts
C
Both
D
None

#### Slide 24 -Quizvraag

what is the velocity at t = 6 s?

#### Slide 25 -Open vraag

What is vstart in A?

#### Slide 26 -Open vraag

What is vfinal in A in km/h?

#### Slide 27 -Open vraag

Calculate the average speed in part C of the graph

#### Slide 28 -Open vraag

Calculate the travelled distance in part A of the graph