2T Movement 5.2 (2)

• Natuurkunde
• Middelbare school
• vwo
• Leerjaar 2

Plan for today

1. Refreshing paragraph 2

2. Discussing the homework

3. Calculations with varying speed

4. Working on the exercises in the book (Ex. 10)

Learning objectives

• You can calculate the average speed from a speed-time-diagram with uniform acceleration/decelaration.
• You can calculate the distance covered in a diagram with uniform accelaration/decelaration. 

What is the formula for the speed?

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

10 m/s = ... km/h

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

Homework

1, 2, 4, 5, 8, 9

A graph of the speed

On the y-axis (vertical),    we put the speed.

On the x-axis (horizontal), we put the time.

So what would constant speed look like?

A graph of the speed

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

A graph of the speed

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

How much distance is travelled here?

How much distance is travelled?

A graph of the speed

How can we do this here?

A graph of the speed

How can we do this here?

--> We use the average

       speed

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​​​​

Working on the exercises

Read: p. 8 - 11

Make: 3, 6, 7, 10, 11, 12

Start with exercise 10!

Not finished? --> Homework!