1.3 Friction

• Natuurkunde / Scheikunde
• Middelbare school
• vwo
• Leerjaar 1

Learning goals

• Give examples of friction
• Describe the effect of friction on motion
• Explain how to reduce friction
• Describe how friction can be useful

The homework

	Thrust of the car (N)	Friction (N)	Air resistance (N)	Resultant force (N)
A	1500	700	800
B	3000	500	100
C	1000	600	500
D	2500	900	400

What is friction?

Friction

A resistance between two sufraces moving over each other. 

Friction.

What causes friction?

• difference in texture
• Surface sticking together

Friction

How does this effect motion?

Friction

What is the unit of friction?

• Newtons

Friction.

In which direction does friction act?

• In the opposite to the motion.

100 N

30 N

Working independently

Homework:
workbook page 8 and 9

1.2 exercise E

1.3 exercise 1