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Science > Energy > Flashcards

Energy Flashcards

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1
Q

What is the definition of work

A

The transfer of energy from one object to another

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2
Q

What is the definition of energy

A

The ability to do work

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3
Q

Energy due to position

A

PE

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4
Q

Energy due to motion

A

KE

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5
Q

What is mechanical energy

A

All of the PE + KE in a system

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6
Q

What is non mechanical energy

A

Energy at the level of atoms that does not affect motion on a larger scale

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7
Q

What is the law of conservation of energy

A

Energy can not be created or destroyed but it can be transformed or transferred

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8
Q

What is energy fission

A

Splitting of nuclei

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9
Q

What is energy fusion

A

The joining of nuclei

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10
Q

What is the calculation of KE

A

KE= 1/2mv^2

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11
Q

Calculation of PE

A

GPE=mgh

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12
Q

Example of elastic potential energy

A

A stationary wind-up toy with a compressed spring

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13
Q

Example of GPE~> KE

A

A descending roller coaster ride
A girl jumping in a trampoline
A ball bouncing
The flight of a ball

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14
Q

A skier poised to take of at the top of a hill

A

GPE

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15
Q

A car driving on a flat road

A

KE

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16
Q

A vibrating guitar string

A

KE/PE

17
Q

A compressed string

A

Elastic Energy

18
Q

Height calculation

A

h=GPE/gm

19
Q

Mass calculation using GPE

A

m=GPE/hg

20
Q

Mass calculation using KE

A

m=2KE/v^2

21
Q

Velocity calculation

A

v=(square root) 2KE/m

22
Q

Example of KE~>GPE

A

Tossing a ball
A pendulum
Roller coaster
Flight of a ball

23
Q

What is the difference between work and energy

A

Energy exists when an object isn’t moving

24
Q

List forms energy:
A car sitting still

A

Mechanical energy
GPE

25
Q

List forms of energy:
A compressed spring

A

Mechanical energy
Elastic Potential Energy

26
Q

List forms of energy:
A hot cup of soup

A

Non mechanical energy
Thermal energy
Non mechanical kinetic energy
Chemical energy

27
Q

Example of chemical energy

A

Food
Head of match
Gasoline
Wood

28
Q

Example of gravitational PE

A

Apple on a tree

29
Q

Example Elastic PE

A

Rubber band
Spring
Bungee cord

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