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Science > Ch.3 SG > Flashcards

Ch.3 SG Flashcards

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1
Q

What’s the Unit for power

A

Watts

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2
Q

What’s the Unitt for work and energy

A

Joules

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3
Q

What’s the gravity of earth

A

9.8

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4
Q

Equation for Work

A

force x distance

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5
Q

equation for power

A

work/time

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6
Q

has few moving parts

A

simple machine

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7
Q

includes two or more simple machines

A

compound machines

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8
Q

What type of machine can raise you to a new height

A

incline plane

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9
Q

What type of machine applied a perpendicular force to its motion

A

wedge

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10
Q

makes work easier

A

machine

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11
Q

Three ways that machines make work easier

A
  1. changes the direction of a force
  2. increasing the distance or speed of a force
  3. increases an objects force
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12
Q

How to find mechanical advantage

A

din / dout
or
fout / fin

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13
Q

force amplication achieved by a using a tool

A

MA

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14
Q

what’s the equation for efficiency

A

wout/win x 100

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15
Q

what is energy

A

ability to do work or cause change

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16
Q

What is the Unit for energy

A

J

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17
Q

Kinetic energy depends on the objects…….

A

motion

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18
Q

what’s the eqaution for KE

A

m(vsq.) / 2

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19
Q

How to solve GPE

A

mass x gravity x height

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20
Q

GPE depends on an objects

A

position off the ground

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21
Q

energy bases on the position due to being moved from an original starting point

A

elastic potential

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22
Q

Example of elastic potential energy

A

trampoline

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23
Q

Examples of chemical energy

A

sun to plants,
oil to our cars,
food to our bodies,

24
Q

travels in waves and does not need a medium

A

electromagnetic

25
Q

Kinetic or Potential: Electromagnetic

A

Kinetic

26
Q

Kinetic or Potential: Chemical

A

Potential

27
Q

Kinetic or Potential: Electrical

A

both

28
Q

Kinetic or Potential:Thermal

A

Both

29
Q

Kinetic or Potential: Nuclear

A

potential

30
Q

Kinetic or Potential: Mechanical

A

both

31
Q

examples of elctromagnetic

A

x-rays, microwaves, light

32
Q

example of elecrtical

A

powers electric devices

33
Q

energy of electrical chargers by the movement of particles

A

electrical

34
Q

examples of thermal enrgy

A

ironing, gas stove, heat

35
Q

contiained in a space that is respposinble for temp, total kinetic and potential enegy of particles

A

Thermal

36
Q

potential energy stored in the nucleas

A

nuclear

37
Q

fission

A

break apart

38
Q

fusion

A

come together

39
Q

why don’t we use fusion more

A

too much heat

40
Q

states that the total energy stays the same

A

law of conservation of energy

41
Q

What happens to an objects KE and PE as it falls

A

KE goes up and the PE is going down

42
Q

When an object goes up once it hits the “bottom” what happens to the KE and PE

A

PE goes up and KE goes doqn

43
Q

Once an object falls down to the bottom what is the only present energy

A

KE

44
Q

When an object is at the top of its fall what is the only present energy

A

Potential

45
Q

In what direction does a wedge apply force

A

perpendicular

46
Q

examples of a incline plane

A

ramp,roof

47
Q

flat surface that is raised at an angle

A

incline plane

48
Q

lets us pull down instead of up which allows us to bring heavier objects up

A

Pulley

49
Q

device that allows an object to exert a force greater than the the one used to turn

A

screw

50
Q

reduces the friction when objects are moved over a surface

A

wheel and axle

51
Q

fulcrum in the middle

A

1st classn

52
Q

output in the middle

A

2nd class

53
Q

input in the middle

A

3rd class

54
Q

resulted in the position of an object

A

potential energy

55
Q

MA < 1

A

Increases speed or distance

56
Q

MA > 1

A

Increase in force

57
Q

MA = 1

A

change in direction

Science (6 decks)

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