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Physics definitions. Acceleration Is the rate of change in velocity of an object divided by the time...

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Physics definitions
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Page 1: Physics definitions. Acceleration Is the rate of change in velocity of an object divided by the time taken for the change. It is measured in ms-2.

Physics definitions

Page 2: Physics definitions. Acceleration Is the rate of change in velocity of an object divided by the time taken for the change. It is measured in ms-2.

Acceleration

•  Is the rate of change in velocity of an object divided by the time taken for the change. It is measured in ms-2

Page 3: Physics definitions. Acceleration Is the rate of change in velocity of an object divided by the time taken for the change. It is measured in ms-2.

Centre of gravity

• Is the point in a body where all the weight of the body appears to be concentrated

Page 4: Physics definitions. Acceleration Is the rate of change in velocity of an object divided by the time taken for the change. It is measured in ms-2.

conduction

• The transfer of energy through a solid without any movement of the particles

Page 5: Physics definitions. Acceleration Is the rate of change in velocity of an object divided by the time taken for the change. It is measured in ms-2.

Conservation of energy

• Energy cannot be created or destroyed only converted from one form into another

Page 6: Physics definitions. Acceleration Is the rate of change in velocity of an object divided by the time taken for the change. It is measured in ms-2.

convection

• The transfer of heat through a liquid or gas caused by the movement of its particles

Page 7: Physics definitions. Acceleration Is the rate of change in velocity of an object divided by the time taken for the change. It is measured in ms-2.

Current (I)

• The movement of an electric charge between two points.

• It is measured in Amperes

Page 8: Physics definitions. Acceleration Is the rate of change in velocity of an object divided by the time taken for the change. It is measured in ms-2.

density

• Density is the mass per unit volume of an object. It is measured in g/cm3 or kg/m3.

• Density = Mass Volume

Page 9: Physics definitions. Acceleration Is the rate of change in velocity of an object divided by the time taken for the change. It is measured in ms-2.

dispersion

•    The breaking up of white light into its constituent colours

Page 10: Physics definitions. Acceleration Is the rate of change in velocity of an object divided by the time taken for the change. It is measured in ms-2.

energy

•  Is the ability to do work

• JOULES

Page 11: Physics definitions. Acceleration Is the rate of change in velocity of an object divided by the time taken for the change. It is measured in ms-2.

flotation

• Is when a less dense object floats in a liquid more dense that the object.

Page 12: Physics definitions. Acceleration Is the rate of change in velocity of an object divided by the time taken for the change. It is measured in ms-2.

force

• A force is a push or a pull which causes a change in the velocity of an object. It is measured in Newtons

• (weight is a FORCE…..of gravity)

Page 13: Physics definitions. Acceleration Is the rate of change in velocity of an object divided by the time taken for the change. It is measured in ms-2.

friction

• Friction is the force between two objects which tries to stop them moving

Page 14: Physics definitions. Acceleration Is the rate of change in velocity of an object divided by the time taken for the change. It is measured in ms-2.

fulcrum

•   The fixed point around which a lever pivots or turns

Page 15: Physics definitions. Acceleration Is the rate of change in velocity of an object divided by the time taken for the change. It is measured in ms-2.

Hookes Law

• The extension in a spring is proportional to the weight applied to it

Page 16: Physics definitions. Acceleration Is the rate of change in velocity of an object divided by the time taken for the change. It is measured in ms-2.

Latent heat• Is the amount of heat energy that causes

a change in state without causing a change in temperature

Page 17: Physics definitions. Acceleration Is the rate of change in velocity of an object divided by the time taken for the change. It is measured in ms-2.

Law of the lever

• When a lever is in equilibrium the sum of the clockwise moments are equal to the sum of the anti clockwise moments

Page 18: Physics definitions. Acceleration Is the rate of change in velocity of an object divided by the time taken for the change. It is measured in ms-2.

Magnetic field

•   The space around a magnet where a magnetic force can be felt

Page 19: Physics definitions. Acceleration Is the rate of change in velocity of an object divided by the time taken for the change. It is measured in ms-2.

mass

•  The amount of matter in an object.

• It is measured in Kg

Page 20: Physics definitions. Acceleration Is the rate of change in velocity of an object divided by the time taken for the change. It is measured in ms-2.

Non renewable energy

•  This is the energy supplied by fossil fuels. They cannot be replenished in a short space of time.

Page 21: Physics definitions. Acceleration Is the rate of change in velocity of an object divided by the time taken for the change. It is measured in ms-2.

Ohms law

• The current is proportional to the voltage in a conductor at constant temp.

• V = IR or

• R = V

I

Page 22: Physics definitions. Acceleration Is the rate of change in velocity of an object divided by the time taken for the change. It is measured in ms-2.

power

• The amount of work done divided by the time. It is measured in Watts

• Power =WorkTime

Page 23: Physics definitions. Acceleration Is the rate of change in velocity of an object divided by the time taken for the change. It is measured in ms-2.

pressure

• The force that an object exerts over unit area. It is measured in Pascals

• Pressure =Force

Area

Page 24: Physics definitions. Acceleration Is the rate of change in velocity of an object divided by the time taken for the change. It is measured in ms-2.

radiation• Heat transfer by waves even through a

vacuum eg heat radiation from the sun

Page 25: Physics definitions. Acceleration Is the rate of change in velocity of an object divided by the time taken for the change. It is measured in ms-2.

reflection

•  The bouncing of light from a reflective surface

Page 26: Physics definitions. Acceleration Is the rate of change in velocity of an object divided by the time taken for the change. It is measured in ms-2.

refraction

•  The bending of light as it travels from one medium to another

Page 27: Physics definitions. Acceleration Is the rate of change in velocity of an object divided by the time taken for the change. It is measured in ms-2.

Renewable energy

• Energy that is in continuous supply and comes from natural resources

Page 28: Physics definitions. Acceleration Is the rate of change in velocity of an object divided by the time taken for the change. It is measured in ms-2.

speed

• Is the distance travelled in unit time. It is measured in ms-1

• Speed=DistanceTime

Page 29: Physics definitions. Acceleration Is the rate of change in velocity of an object divided by the time taken for the change. It is measured in ms-2.

temperature

• The measure of how hot or cold an object is. It is measured in degrees Celsius

Page 30: Physics definitions. Acceleration Is the rate of change in velocity of an object divided by the time taken for the change. It is measured in ms-2.

Velocity

•   Is speed in a given direction. It is measured in ms-1

Page 31: Physics definitions. Acceleration Is the rate of change in velocity of an object divided by the time taken for the change. It is measured in ms-2.

Volume

• The amount of space something takes up

• Units

• cm3 for solids

• ml or litres for liquids

Page 32: Physics definitions. Acceleration Is the rate of change in velocity of an object divided by the time taken for the change. It is measured in ms-2.

Weight

• Is the force on an object caused by gravity. It is measured in Newtons

• Weight= Mass (kg) X 10

Page 33: Physics definitions. Acceleration Is the rate of change in velocity of an object divided by the time taken for the change. It is measured in ms-2.

work

• Work is done when a force moves an object a distance. It is measured in Joules

• Work= Force X DistanceJoules


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