Les 8 Gravity

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

Project week

• Do you know what to prepare?
• Is it clear what we will be doing?

Bunsen burner

Dropping something

§1.4 Gravity

Gravity

Todays lesson

• Discussing gravity.
• The formula for weight
• Checking the homework

Learning goals

• Explain what gravity is.
• Describe weight.
• Name and apply the formula for weight.

Gravity
What comes to mind?

Weight and mass are the same thing

1. True
2. False

The unit of weight is...

1. Kilograms
2. Newton

What is the difference between mass and weight?

Weight

The formula for weight

Weight = mass x gravitational field strength

(N)

(kg)

(N/kg)

Gravitational field strength earth = 10 N/kg

Gravitational field strength mars = 3.7 N/kg

	10 kg	20 kg	50 kg
Weight (N) On earth
Weight (N) On mars

Weight = mass x gravitational field strength

Gravitational field strength mars = 10 N/kg

Gravitational field strength mars = 3.7 N/kg

	10 kg	20 kg	50 kg
Weight (N) On earth	100	200	500
Weight (N) On mars

Weight = mass x gravitational field strength

Gravitational field strength mars = 10 N/kg

Gravitational field strength mars = 3.7 N/kg

	10 kg	20 kg	50 kg
Weight (N) On earth	100	200	500
Weight (N) On mars	37	74	185

Weight = mass x gravitational field strength

Checking the

Homework

Learning goals

• Explain gravity.
• Describe the difference between mass and weight.
• Do calculations using the formula for weight.