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Mass vs Weight. Mass Amount of matter in an object Does NOT change with location Measured in grams with a balance.

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Presentation on theme: "Mass vs Weight. Mass Amount of matter in an object Does NOT change with location Measured in grams with a balance."— Presentation transcript:

1 Mass vs Weight

2 Mass Amount of matter in an object Does NOT change with location Measured in grams with a balance

3 Weight The force of gravity on an object DOES change with location Measured in Newtons with a scale Weight = mass x gravity F w = mg g earth = 9.8 m/s 2 (mass must be in kg) g moon = 1.6 m/s 2 g Jupiter = 24.8 m/s 2

4 Practice Problems 1.Your cat has a mass of 2kg. What is her weight in Newtons on Earth? F w = mg F w = 2kg x 9.8 m/s 2 F w = 19.6 N

5 2. What is your cat’s weight on the moon? (g = 1.6 m/s 2 ) F w = mg F w = 2kg x 1.6 m/s 2 F w = 3.2 N

6 3. What is your cat’s weight on Jupiter? g Jupiter = 24.8 m/s 2 F w = mg F w = 2kg x 24.8 m/s 2 F w =49.6 N Same size, same amount of stuff (mass), but different gravity

7 Gravity Force that acts between any two masses, an attractive force that pulls objects together


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