Mass amount of matter _ m is the ______________ that

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Mass amount of matter _________ m is the ______________________ that an object contains. It is a ______________ . scalar A. units of mass: SI: _________________  are _____________________ units  have the ____________________________ kilograms, kg fundamental prefix kilo, k = 103 Other mass units: 1/ _____________ This is the approximate mass of a small _________________ or of a ___________________ Conversions: 1 kg = ________ g = _________ g 1 g = _________ kg grams, g paper clip dollar bill 103 1000 10-3

In: m = 10 g  g stands for _________________ Note: In: m = 10 g  g stands for _________________ In g = 9.8 m/s2  g = ___________________ ___________________ grams acceleration due to gravity 2/ The _______________ mass unit u is defined as: (1/12) the mass of a ____________________ Conversion: 1 u = _______________ (see PhysRT) 1 proton or neutron mass = __________ universal 12C atom 1.66 x10-27 kg ≈ 1u 3/ British: __________ (don’t need to know) ≈15 kg slugs

II. __________w is the ____________________ (Fg) (usually due to a planet) acting on an object. It is a _____________ b/c is has _____________ ____________________________________________ Weight force of gravity vector direction downwards towards the planet's center. A. Units of weight are the same as for __________: SI: _________________  derived British: _________________ forces newtons, N pounds, lb B. The weight of an object depends on: 1/ the ____________ of the object itself; 2/ the ___________ from the center of the planet; 3/ the ___________ of the planet. mass distance mass

For the same object at 3 different _____________ : w or Fg more mass  ________________ more weight mass of object locations For the same object at 3 different _____________ : _______ m same less w same _______ m more w mass m w planet denser planet Mass m is___________________________. It is a ____________________ of an object. the same everywhere property

w is different in different locations because _________________________________________ the strength of gravity can vary Remember: _____________ = __________________ C. Its magnitude can be found from: where m is the mass of the object _________ and g is the _____________________________ . On Earth’s surface, g = _________________ Farther from the surface or on other planets, _____________________________________________ . weight w force of gravity Fg PhysRT: Fg = mg or: w = mg in kg acceleration due to gravity 9.81 m/s2 g can have different values or be zero

Ex: Find the weight of a 45-kg goblin. w = mg = w = = What is the force of gravity acting on the goblin? Ex: The weight of a stick of butter is about 1.0 N. What is its mass? Ex: What is the weight of a 600-N student?