Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

physical science > unit 4 > Flashcards

unit 4 Flashcards

You may prefer our related Brainscape-certified flashcards:
Biology 101 flashcards
1
Q

work

A

force applied through a distance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

the direction of the force that you apply to an object affects how much ___ you do on it

A

work

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

when ____ + _____ are parallel, w=fd

A

force, motion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

when force is _____ to motion, the work from that force is ____

A

perpendicular, 0

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

you can only do ____ on an object while applying ____ on an object

A

work, force

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

device that changes the force/increases the motion from work

A

machine

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

machine that does work with only 1 movement of the machine

A

simple machine

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

examples of a simple machine

A

lever, pulley, wheel and axle, inclined plane, screw, wedge

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

combination of 2 plus simple machines

A

compound machine

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

examples of compound machine

A

scissors, bicycle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

machines can increase for ____ increase speed

A

or

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

the ratio of output work to input work

A

efficiency

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

what is efficiency measured in

A

%

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

efficiency equation

A

e = w out/w in x 100

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

how are machines made effeicient?

A

reducing friction (adding lubricant- oil/grease)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

ratio of the output force to input force

A

mechanical advantage

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

mechanical advantage equation

A

MA = Fout/ Fin

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

force that a person/ device applies to a machine

A

input force

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

force that the machinr applies to another object

A

output force

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

the ability to cause change

A

energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

what can energy be described as?

A

the ability to do work

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

what is energy measured in?

A

joules

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

anything around which you can imagine a boundary

A

system

24
Q

a system can be ____ or a _____ of objects

A

single; group

25
Q

true or false:
when 1 system does work on a 2 system, energy is transferred from one sytem to the second system

A

true

26
Q

what are the different forms of energy?

A

mechanical
chemical
radiant
electrical

27
Q

energy due to motion

A

kinetic energy

28
Q

what type of energy depends on objects mass and speed

A

kinetic energy

29
Q

kinetic energy equation

A

KE = 1/2 mv^2

30
Q

energy stored due to interactions between objects

A

potential energy

31
Q

energy stored by compressing or stretching an object

A

elastic potential energy

32
Q

energy due to chemical bonds

A

chemical potential energy

33
Q

energy due to the gravitational forces between objects

A

gravitaional potential energy

34
Q

the GPE of a system with just earth and the object depends on objects ___, earths ____ and object ____

A

mass, gravity, height

35
Q

near earths surface, g = _____

A

9.8 n/kg

36
Q

GPE equation

A

GPE = mgh

37
Q

GPE varies with chosen ____

A

refence level

38
Q

law of conservation of energy

A

energy cannot be created or destroyed

39
Q

true or false:
energy cannot convert from 1 form to another and cannot transfer 1 place to another

A

false; can

40
Q

the universal principle states that the _____ ______ remains a constant

A

total energy

41
Q

the sum of the kinetic and potential energy of the objects in a system

A

mechanical energy

42
Q

mechanical energy examples

A

kinetic, elastic, potential, gravitational potential energy

43
Q

energy transformations happen during _____ _____ when an object moves in a curved path

A

projectile motion

44
Q

what type of energy does fraction and air resistance convert some mechanical energy to?

A

thermal energy

45
Q

what type of energy does feul store ?

A

chemical potential energy

46
Q

the rate at which energy is converted

A

power

47
Q

power equation

A

P = e/t
energy/time

48
Q

power is measured in what?

A

watts

49
Q

1 watt = 1 ____ per second

A

joule

50
Q

energy from food is measured in ____

A

calories

51
Q

every gram of foos fat = how many calories of energy?

A

10

52
Q

carbs and proteins each = how many calories of energy per gram?

A

5

53
Q

everythinng out body does needs what?

A

energy

54
Q

radiant energy comes from what type of energy

A

electrical energy

55
Q

when an object is in freefall, kinetic energy _____, while GPE _____

A

increases; decreaases

56
Q

what energy comes from food?

A

chemical enegry

57
Q

law of consevrtaion of enegry means that the toatl energy remains ____

A

constant

physical science (9 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions