Energy Flashcards by Abe Brown

Q

The principle of conservation of energy

A

Energy cannot be created or destroyed, only transferred from one store to another

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Q

Work Formula

A

W=Fs

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Q

Units for work

A

Joules

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Q

Units for force

A

Newtons

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Q

Units for distance

A

Meters

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Q

What is mass

A

The amount of physical material

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Q

Units for mass

A

Kilograms

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Q

What is weight

A

Weight is gravity acting on mass

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Q

Units for weight

A

Newtons

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Q

Formula for weight

A

W=mg

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Q

What is extension

A

How much something squashes or stretches

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Q

Formula for gravitational potential energy

A

E=mgh

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Q

Formula for kinetic energy

A

E=0.5*mvv

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Q

Formula for velocity

A

Velocity=distance/time

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Q

Formula for elastic potential energy

A

E=0.5*kee

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Q

Formula for input energy

A

Input=useful output+wasteful output

Q

Formula for efficiency

A

Efficiency=useful/total input

Q

Units for power

A

Watts

Q

Formula for power

A

P=E/t

Q

What is spring constant

A

The newtons needed to stretch a meter