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Science > Ch.3 SG > Flashcards

Ch.3 SG Flashcards

hey lacey 🤫🧏‍♂️ (57 cards)

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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

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A

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

24
Q

travels in waves and does not need a medium

Study These Flashcards
A

electromagnetic

25
Kinetic or Potential: Electromagnetic
Kinetic
26
Kinetic or Potential: Chemical
Potential
27
Kinetic or Potential: Electrical
both
28
Kinetic or Potential:Thermal
Both
29
Kinetic or Potential: Nuclear
potential
30
Kinetic or Potential: Mechanical
both
31
examples of elctromagnetic
x-rays, microwaves, light
32
example of elecrtical
powers electric devices
33
energy of electrical chargers by the movement of particles
electrical
34
examples of thermal enrgy
ironing, gas stove, heat
35
contiained in a space that is respposinble for temp, total kinetic and potential enegy of particles
Thermal
36
potential energy stored in the nucleas
nuclear
37
fission
break apart
38
fusion
come together
39
why don't we use fusion more
too much heat
40
states that the total energy stays the same
law of conservation of energy
41
What happens to an objects KE and PE as it falls
KE goes up and the PE is going down
42
When an object goes up once it hits the "bottom" what happens to the KE and PE
PE goes up and KE goes doqn
43
Once an object falls down to the bottom what is the only present energy
KE
44
When an object is at the top of its fall what is the only present energy
Potential
45
In what direction does a wedge apply force
perpendicular
46
examples of a incline plane
ramp,roof
47
flat surface that is raised at an angle
incline plane
48
lets us pull down instead of up which allows us to bring heavier objects up
Pulley
49
device that allows an object to exert a force greater than the the one used to turn
screw
50
reduces the friction when objects are moved over a surface
wheel and axle
51
fulcrum in the middle
1st classn
52
output in the middle
2nd class
53
input in the middle
3rd class
54
resulted in the position of an object
potential energy
55
MA < 1
Increases speed or distance
56
MA > 1
Increase in force
57
MA = 1
change in direction

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