Review for Physics Flashcards

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1
Q

Motion

A

When an object moves away from a starting point

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2
Q

Uniform Motion

A

Something moving in a straight line and constant speed. Almost impossible

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3
Q

Scalar Quanties

A

Have no direction but show how much. (The mangunitude)

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4
Q

Vector Quantities

A

Show the distance and magnitude.

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5
Q

Vector quanties examples

A

Should be velocity and displacement and acceleration and weight

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6
Q

Positive directions

A

Up, right, north, east

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7
Q

Negative directions

A

Down, left, south, west.

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8
Q

Average speed

A

Can be used to replace uniform motion. Dont forget dfinal and dinital and tfinal and tinitial

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9
Q

How to get positive acceleration

A

Change in magnitude and direction are both positive. An object speeding up.
The change in magnitude and direction are both negative. An object is slowing down.

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10
Q

What is negative acceleration

A

Change in magnitude is negative and the direction is positive. An object is slowing down in a positive direction.
The change of magnitude is positive and the direction is negative. An object speeding up in the negative direction.

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11
Q

Graphing

A

Add a title

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12
Q

Unform Motion

A

Straight line

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13
Q

x axis

A

Independant

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14
Q

y axis

A

Responding

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15
Q

Distance Time Graphs

A

Shows how far an object has traveled in a given time. The slope is speed.

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16
Q

Speed Time Graphs

A

Show the speed of an object changing in time. Slope represents acceleration.

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17
Q

Upward slope in speed time graphs

A

Speed is increasing

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18
Q

Downward slope in speed time graphs

A

Speed is decreasing

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19
Q

Position time graphs

A

Uses displacement and time. Includes the direction. The slope is velosity.

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20
Q

What is the slope of a straight horizontal line?

A

0

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21
Q

Velosity Time Graphs

A

Uses velosity and time. The slope is acceleration.

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22
Q

Positive acceleration in a position time graph

A

Looks like a half upward D

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23
Q

Negative acceleration in a position time graph

A

Looks like half of the top of a D.

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24
Q

Positive acceleration in a velosity time graph

A

Half of an upward v.

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25
Q

Negative acceleration in a velosity time graph

A

Half of a downward v.

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26
Q

Force

A

Is a push or a pull on an object. N

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27
Q

Newtons first law

A

An object will stay at rest unless acted upon by unbalenced forces.
Objects in motion remain in motion unless they are acted upon by unbalenced forces.

28
Q

Work

A

Whenever a force is moving an object work, is done. Is a scalar quantity.

29
Q

For work to be done

A
  1. There must be movement
  2. There must be a force
  3. The force and distance must be in the same direction.
30
Q

Energy

A

The ability to do work. Transfers work to the object.

31
Q

Kenetic energy

A

Ep and stands for an object in motion with energy

32
Q

Gravitation potential energy

A

Is the energy something has due to being still or its position.

33
Q

Mass

A

How much matter is in an object. Scalar.

34
Q

Weight

A

How much force is holding it to earth.
Vector.

35
Q

System

A

A set of interconnected parts.

36
Q

Open system

A

Lets matter and energy escape. The earth

37
Q

Closed system

A

Lets energy escape but matter cannot. Closed can of soup

38
Q

Isolated system

A

Cannot allow matter or energy escape. Thermos.

39
Q

Energy of a system can be increased

A
  1. Heat can be added
  2. Work can be done
40
Q

Energy of a system can be decreased

A
  1. Heat can leave
  2. Work can be done by the system on something else.
41
Q

First law of therodyodmics

A

Energy cannot be created or destroyed only transferred.
The total energy in a system stays constant because its surroundings stay constant.

42
Q

The perfect machine

A

Would convert all energy into mechanical energy. No energy lost.

43
Q

Second law of thermodyamics

A

Heat always flows from hot to cold. Ice cube melting on a hand.

44
Q

Law of conservation of energy

A

Mechanical energy in a system remains constant.

45
Q

What happens before an object falls to the ground.

A

The Ek becomes the same as the oringial Ep

46
Q

Conservation of energy in a pendelum

A

When a pendelium is lifted a certain height work has been done and it has gained energy.

47
Q

Efficiency

A

The purpose of a machine is to convert energy

48
Q

Energy input

A

The energy source.

49
Q

Useful work output

A

The work the machine is supposed to do.

50
Q

All the vector quantity

A

Displacement
Velosoity
Weight
Acceleration
Position time graphs

51
Q

Elastic poitential energy

A

When you change their shape they automaticly spring back.

52
Q

Examples of elastic potiential energy

A

Springs
Elastics
Diving boards

53
Q

Chemical poitential energy

A

Stored in chemical bonds of compounds

54
Q

Chemical poitnetal energy examples

A

Batterys
Food that is chemically in cells
Burning fossil fuels

55
Q

Combustion

A

The burning of fuel

56
Q

Nuclear Energy

A

Potential energy stored inside the nucleus. Whenever a nucleus is split or two necloulis are combined

57
Q

Nuclear fusion

A

Combine

58
Q

Nuclear fission

A

Split

59
Q

Solar Energy

A

Energy from the sun. Is a reaction of hydrogen and hydrogen fusion. The reaction releases energy

60
Q

Electrical Energy

A

Is the work done by charges

61
Q

Electrical potential energy

A

Work needed to move a charge

62
Q

Internal combustion engines

A

Fuel goes into the cylinder and combustion happens
Gases are created to fuel the pistion

63
Q

Enviromental effects of combustion engines are

A

Greenhouse gasses
Smog
Acid rain

64
Q

Production of electricity

A

coal, heat, boiled water, stream, turns turbine connected to genertor

65
Q

Nuclear energy reaction process

A

Nuclear fission, heat, boiled water, stream, turns turbine connected to genertor