# physics

?
calculating weight?
to calculate weight you have to times the mass by gravity.
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what is gravity?
Gravity is a force that pulls a certain thing towards the centre of the earth.
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Orbits?
Planets and satellites are kept orbiting by gravitational pull, for planets to the the sun , for satellites to the earth.
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The moment of a force is given by the equation?
Moment=force(N)* distance from pivot
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instantaneous speed is what?
the speed of an object at a particular moment in time.- measured in metres per second.
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Electrical Energy?
is very useful, because it is easily converted into other forms. wherever there is a current flowing there is electrical energy.
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Light energy?
anything luminous gives off light energy. Things like the sun, light bulbs and candles.
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Sound energy?
Anything noisy gives off sound energy.
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Kinetic Energy?
Anything that moves gives off kinetic energy.
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Thermal Energy?
Anything with a temperature above absolute Zero (-273℃) has heat energy.
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Gravitational potential energy?
Anything that is above the ground has gravitational potential energy.
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Elastic Energy?
Anything stretched has elastic energy.
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Chemical Energy?
Anything with stored energy which can be released by a chemical reaction has chemical energy.
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Heat and temperature are different?
Temperature is a measure of how hot something is , it is measured in ℃. Heat is a form of energy , and it's measured in joules.
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pressure is measured in what?
pascals.
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pressure=
force divided by area
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speed?
how far you have travelled in a certain time.
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SIDOT?
Speed is distance over time.
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## Other cards in this set

### Card 2

what is gravity?

#### Back

Gravity is a force that pulls a certain thing towards the centre of the earth.

Orbits?

### Card 4

#### Front

The moment of a force is given by the equation?

### Card 5

#### Front

instantaneous speed is what?