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Physics > Final Exam! > Flashcards

Final Exam! Flashcards

1
Q

what do you call objects you compare something to in order to tell if it is in motion

A

frame of reference

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2
Q

what is the difference between speed and velocity

A

velocity is speed + direction

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3
Q

does friction affect all objects traveling through water, land, or in the air

A

yes

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4
Q

what does a negative number mean when dealing with acceleration…..what does a positive number mean

A

slowing down, then speeding up

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5
Q

what is static friction

A

friction between two objects that are not moving

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6
Q

on a velocity vs. time graph, what shows the value of acceleration

A

slope

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7
Q

when two objects slide past eachother

A

sliding friction

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8
Q

objects that roll over a flat surface

A

rolling friction (bowling)

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9
Q

sum of all of the forces acting on an object

A

net force

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10
Q

what type of forces cause motion

A

unbalanced

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11
Q

the force of _____always opposes motion

A

friction

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12
Q

what are the two things that determine the force of gravity between any two objects

A

mass and distance

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13
Q

an object at rest remains at rest and an object in motion remains in motion unless acted upon by an outside force

A

newtons 1st law

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14
Q

for unbalanced forces, this shows how force, mass, and acceleration are related.

A

newtons 2nd law

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15
Q

for every action, there is an equal and opposite reaction

A

newtons 3rd law

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16
Q

total momentum in an isolated system is not gained or lost, just transferred from one object to another

A

law of conservation of momentum

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17
Q

all objects in the universe attract each other through the force of gravity

A

law of universal gravitation

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18
Q

the tendency of an object to remain in its current state of motion

A

inertia

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19
Q

free fall acceleration is the _____for all objects

A

same

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20
Q

examples of projectile motion

A

throwing a ball, launching something

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21
Q

what effects the momentum of moving obejetcs

A

an increase of mass or velocity will increase the momentum

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22
Q

does an object that is not moving have any momentum

A

no

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23
Q

what happens to the momentum from one moving object when it hits another object

A

it gets transfered

24
Q

what two things determine an objects weight

A

mass and gravity

25
Q

when air resistance and weight are equal, the object will stop acceleration

A

terminal velocity

26
Q

using block and tackle would be advantage…..

A

force

27
Q

increasing the angle of the ramp would _____mechanical advantage

A

decrease

28
Q

% of energy actually used to accomplish the job

A

efficiency

29
Q

according to the doppler effect, an object moving away will have frequencies that are

A

smaller

30
Q

the energy of a wave depends on the ___-of a wave

A

amplitude

31
Q

what type of waves are radio waves

A

electromagnetic

32
Q

what type of waves are sound waves

A

longitudinal

33
Q

what type of waves are light

A

electromagnetic

34
Q

as the period of a wave increases, what happens to the frequency

A

decreases

35
Q

what is transported from place to place by a wave

A

energy

36
Q

the frequency of a sound waves determines the sounds

A

pitch

37
Q

the color of visible light depends on the _____of light

A

wavelength

38
Q

ultrasounds produce

A

sonograms

39
Q

a prism separates white light into the colors through a process called

A

dispersion

40
Q

an insulator would have___-resistance

A

high

41
Q

what do you call the solution that conducts electricity

A

electrolyte (acid in battery)

42
Q

the metal that conducts electricity in a battery are called

A

electrodes

43
Q

electric field lines show _____- and ________of an electric field

A

strength and charge

44
Q

will all areas of a parallel circuit have the same current

A

yes

45
Q

________–is caused by internal friction

A

resistance

46
Q

the units of potential difference is

A

volts

47
Q

in terms of motion what measurement consists of both speed and direction

A

velocity

48
Q

the force exerted on an object due to the pull of gravity is known as

A

weight

49
Q

when net forces acting on an object are zero, what type of movement would an object have

A

none

50
Q

what is the equation for momentum

A

P=mass X velocity

51
Q

what is the correct equation for work

A

work = force X distance

52
Q

what determines the energy of a wave

A

frequency

53
Q

explain how loud and soft spots can develop in concert halls

A

constructive interference-loud

destructive interference- dead/soft spots

54
Q

what term is used to determine the amount of current flowing through a wire

A

amps

55
Q

what happens to a pendulum as it drops

A

potential energy is converted into kinetic energy

Physics (3 decks)

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