Physics - Forces and Energy
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20 Terms
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This is the force that acts up to support any object on a surface.
Contact Force
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The force directed towards the center of any mass.
Gravity
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The pull from the Moon's gravity.
Tidal Force
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This is the force of gravity on an object.
Weight
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This is a kind of frictional force that is caused by a moving object having to push against particles in the air.
Air Resistance
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What is the gravitational force of the earth?
10 N/kg
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What is weight measured in?
Newtons
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What is mass measured in?
Kilograms / kg
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Mass is...
the quantity of matter in an object
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Mass is ....... even if the strength of gravity changes
constant
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Formula to find weight
mass x gravitational force
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Formula to find mass
weight Ă· gravitational force
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A cloud of dust and gas in space is called....
nebula
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How are stars formed?
Stars are formed by nebulas and gas.
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Energy is...
the ability to do work
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How can energy be used to do something?
Energy can be stored or transferred to be able to do something.
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Name the energy forms learned in this chapter.
Kinetic, Chemical, Thermal, Elastic Potential, Gravitational Potential, Sound, Light energy.
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The Law of Conservation of Energy states that energy cannot be ....... or ........
The Law of Conservation of Energy states that energy cannot be created or destroyed.
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Kinetic Energy is
energy in moving objects
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Chemical Energy is
a form of stored energy