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physics > SEMESTER EXAM > Flashcards

SEMESTER EXAM Flashcards

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Physics 101 flashcards AP® Physics flashcards
1
Q

Density equation?

A

Mass over velocity

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2
Q

Force equation?

A

Mass times acceleration

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3
Q

Kinetic energy equation??

A

1/2 mass times velocity squared

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4
Q

Mechanical advantage equation?

A

Output over input

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5
Q

Momentum equation??

A

Mass times velocity

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6
Q

Power equation??

A

Work over distance

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7
Q

Velocity equation??

A

Distance over time

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8
Q

Speed equation?

A

Absolute value of distance over time

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9
Q

Weight equation??

A

Mass times gravity

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10
Q

Work equation??

A

Force times distance

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11
Q

What is acceleration?

A

It specifies how rapidly the velocity of an object is changing

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12
Q

What is angular momentum?

A

How many times an object revolves per the time, it is dependent on a frame of reference; revolution

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13
Q

What is tangential velocity?

A

The velocity coming off an object rotating; dependent on distance from axis and angular velocity

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14
Q

Why can’t you see atoms with a light microscope?

A

The wavelength of the atom is longer than that of light

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15
Q

What is the plum pudding model?

A

A positively charged nucleus w/ negatively charged electrons inside

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16
Q

What is the Rutherford model?

A

A positively charged nucleus with electrons orbiting it and empty space in between

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17
Q

What is the Bohr model?

A

Electrons orbit the nucleus in a path depending on their energies

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18
Q

Modern atom model?

A

Electrons may or may not exist but if they do they exist in orbitals; a cloud of probability

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19
Q

What is center of gravity?

A

The points that force of gravity is considered to act; gravity can be different at different parts of an object; the point it revolves around

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20
Q

What are elements defined by?

A

The # of protons they have

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21
Q

What is free fall?

A

When gravity is the only force acting on an object it is in “free fall”

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22
Q

What is friction?

A

The force that resists relative motion

23
Q

What is the inverse squared law?

A

As the gravitational force increases the inverse squared law is used to determine the increase

24
Q

What is kinetic energy?

A

Energy while in motion

25
Q

What are types of kinetic energy?

A

Thermal, electrical, electromagnetic, elastic(while in motion)

26
Q

What is mass?

A

It determines the strength of resistance to motion; the more mass the more resistance

27
Q

What is force?

A

A push/ pull on an object; cause it to move

28
Q

What is newton’s 1st law of motion?

A

An object remains in motion or at rest unless a force moves it/stops it
AKA inertia
More mass=more inertia
Less mass=less inertia

29
Q

What is newton’s 2nd law?

A

The force is equal to the objects acceleration times mass

30
Q

What is Newton’s third law?

A

For every action there is an equal and opposite reaction

AKA momentum

31
Q

Acceleration equation?

A

Change in velocity over change in time

32
Q

What is a solid?

A

It has the least amount of energy and is confined by electrostatic attraction
(Standing at desk)

33
Q

What is a liquid?

A

Less confined; gravity keeps it together; forms to fit container
(Line against back counter)

34
Q

What is a gas?

A

Gas:spread out in order to be as far apart as possible

Moves slowly around container

35
Q

What is plasma?

A

It has the most energy; most common; ionized gases

Moving quickly around container

36
Q

What is the curvature of space time caused by?

A

The momentum/energy of the matter

37
Q

The speed of light is??

A

Constant

38
Q

What are he postures of relativity?

A

The laws of physics are the same no matter the reference frame, the speed of light is the same for all observers

39
Q

Does simultaneousness exist?

A

No, we only see things as happening at one time in certain reference frames

40
Q

At relative speeds observers inside experience time

A

Slower

41
Q

Objects moving at relativistic speeds appear

A

Shorter than slow moving objects

42
Q

L prime=

L=

A

L prime=outside

L=inside

43
Q

T prime=

T=

A

T prime= outside

T=person in the action

44
Q

The closer you get to the speed of light, mass is

A

Increased

45
Q

Work is what kind of force?

A

A vector force

46
Q

What is a vector?

A

The direction of travel; either positive or negative

47
Q

What is speed?

A

How far an object travels in a given time interval no matter the direction

48
Q

What is velocity?

A

It refers to the maginitude and direction

It’s a vector!!

49
Q

What is work?

A

The force applied to move an object

50
Q

What is rotation?

A

An object turning about an inside axis

Aka spin!!

51
Q

Gravity is

A

9.8 m/s

52
Q

To have momentum an object must have

A

Mass and velocity

53
Q

Something that has kinetic energy has

A

Momentum

physics (10 decks)

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