Les 8 Gravity

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

§1.4 Gravity

Gravity

Todays lesson

• Discussing gravity.
• Weight and mass.
  
• The formula for weight.
• working independently.

Learning goals

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

Gravity

Gravity:

A force between all objects.

What are

Mass and weight?

Weight = 

Mass = 

How much matter an object is made of (kg).

How strong the force of gravity is on an object.

The formula for weight

Weight = mass x gravitational field strength

(N)

(kg)

(N/kg)

The formula for weight

w=m⋅g

(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

Homework

Workbook §1.4 

all exercises

Learning goals

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