Weight, Mass & Gravity (OCR GCSE Physics A (Gateway Science Suite)): Flashcards

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Weight, Mass & Gravity
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Definition of weight

Force acting on object due to gravity

Definition of mass

How much matter an object has

Weight & mass relationship

Directly proportional

gg on Earth

9.89.8 N/kg

Formula for weight

W=mgW = mg

Unit of weight

Newtons (N)

Unit of mass

Kilograms (kg)

Unit of gravitational field strength

N/kg (newtons per kilogram)

If mass doubles, weight...

Also doubles

Does weight depend on location?

Yes, weight changes with location

Does mass depend on location?

No, mass is constant

Is mass scalar or vector?

Scalar quantity

Weight on Earth vs Moon

Different (weight changes with gravity)

Mass on Earth vs Moon

Same (mass doesn't change)

Tool to measure weight

Newton meter

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