Review for Physics

Question 1

Motion

Answer 1

When an object moves away from a starting point

Question 2

Uniform Motion

Answer 2

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

Question 3

Scalar Quanties

Answer 3

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

Question 4

Vector Quantities

Answer 4

Show the distance and magnitude.

Question 5

Vector quanties examples

Answer 5

Should be velocity and displacement and acceleration and weight

Question 6

Positive directions

Answer 6

Up, right, north, east

Question 7

Negative directions

Answer 7

Down, left, south, west.

Question 8

Average speed

Answer 8

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

Question 9

How to get positive acceleration

Answer 9

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.

Question 10

What is negative acceleration

Answer 10

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.

Question 11

Graphing

Answer 11

Add a title

Question 12

Unform Motion

Answer 12

Straight line

Question 13

x axis

Answer 13

Independant

Question 14

y axis

Answer 14

Responding

Question 15

Distance Time Graphs

Answer 15

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

Question 16

Speed Time Graphs

Answer 16

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

Question 17

Upward slope in speed time graphs

Answer 17

Speed is increasing

Question 18

Downward slope in speed time graphs

Answer 18

Speed is decreasing

Question 19

Position time graphs

Answer 19

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

Question 20

What is the slope of a straight horizontal line?

Answer 20

0

Question 21

Velosity Time Graphs

Answer 21

Uses velosity and time. The slope is acceleration.

Question 22

Positive acceleration in a position time graph

Answer 22

Looks like a half upward D

Question 23

Negative acceleration in a position time graph

Answer 23

Looks like half of the top of a D.

Question 24

Positive acceleration in a velosity time graph

Answer 24

Half of an upward v.

Question 25

Negative acceleration in a velosity time graph

Answer 25

Half of a downward v.

Question 26

Force

Answer 26

Is a push or a pull on an object. N

Question 27

Newtons first law

Answer 27

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.

Question 28

Work

Answer 28

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

Question 29

For work to be done

Answer 29

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

Question 30

Energy

Answer 30

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

Question 31

Kenetic energy

Answer 31

Ep and stands for an object in motion with energy

Question 32

Gravitation potential energy

Answer 32

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

Question 33

Mass

Answer 33

How much matter is in an object. Scalar.

Question 34

Weight

Answer 34

How much force is holding it to earth. Vector.

Question 35

System

Answer 35

A set of interconnected parts.

Question 36

Open system

Answer 36

Lets matter and energy escape. The earth

Question 37

Closed system

Answer 37

Lets energy escape but matter cannot. Closed can of soup

Question 38

Isolated system

Answer 38

Cannot allow matter or energy escape. Thermos.

Question 39

Energy of a system can be increased

Answer 39

1. Heat can be added 2. Work can be done

Question 40

Energy of a system can be decreased

Answer 40

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

Question 41

First law of therodyodmics

Answer 41

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

Question 42

The perfect machine

Answer 42

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

Question 43

Second law of thermodyamics

Answer 43

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

Question 44

Law of conservation of energy

Answer 44

Mechanical energy in a system remains constant.

Question 45

What happens before an object falls to the ground.

Answer 45

The Ek becomes the same as the oringial Ep

Question 46

Conservation of energy in a pendelum

Answer 46

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

Question 47

Efficiency

Answer 47

The purpose of a machine is to convert energy

Question 48

Energy input

Answer 48

The energy source.

Question 49

Useful work output

Answer 49

The work the machine is supposed to do.

Question 50

All the vector quantity

Answer 50

Displacement Velosoity Weight Acceleration Position time graphs

Question 51

Elastic poitential energy

Answer 51

When you change their shape they automaticly spring back.

Question 52

Examples of elastic potiential energy

Answer 52

Springs Elastics Diving boards

Question 53

Chemical poitential energy

Answer 53

Stored in chemical bonds of compounds

Question 54

Chemical poitnetal energy examples

Answer 54

Batterys Food that is chemically in cells Burning fossil fuels

Question 55

Combustion

Answer 55

The burning of fuel

Question 56

Nuclear Energy

Answer 56

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

Question 57

Nuclear fusion

Answer 57

Combine

Question 58

Nuclear fission

Answer 58

Split

Question 59

Solar Energy

Answer 59

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

Question 60

Electrical Energy

Answer 60

Is the work done by charges

Question 61

Electrical potential energy

Answer 61

Work needed to move a charge

Question 62

Internal combustion engines

Answer 62

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

Question 63

Enviromental effects of combustion engines are

Answer 63

Greenhouse gasses Smog Acid rain

Question 64

Production of electricity

Answer 64

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

Question 65

Nuclear energy reaction process

Answer 65

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