Unit 7 · Equation of motion for free fall

Mass and weight Presentation

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Science and Technology, Grade 10 · Unit 7

Mass and Weight

Mass in kg · Weight in N · W = mg

What we will learn

🧱

Define mass and give its unit

⬇️

Define weight, its unit and direction

🧮

Calculate weight using W = mg

🌍

Explain why weight changes with place and planet

Mass versus weight

🧱Mass
Quantity of matter
Scalar
Unit: kg
Same everywhere
VS
⬇️Weight
Force of gravity
Vector, towards the centre
Unit: N
Changes with g

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Presenter notes: Today we separate two words that everyday speech mixes up: mass and weight.