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Physics 10 Flashcards

1
Q

Uniform motion

A

when an object travels at the same speed in a straight line (hard to maintain)

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2
Q

Average speed formula

A

average speed= distance travelled/time elapsed OR V= d/t

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3
Q

distance formula (speed)

A

d= v x t

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4
Q

Time formula (speed)

A

t= d/v

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5
Q

Distance time graph/ position time graph horizontal line

A

a flat line indicates zero speed, the object is stationary

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6
Q

Steep line on a distance/position time graph

A

a steep line indicates a fast speed

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7
Q

Shallow line on a distance/ position time graph

A

a shallow line indicates a slow speed

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8
Q

Slope calculation for distance/ position time graph

A

slope= rise/run
=change in distance/ change in time
=df-di/tf-ti
=speed

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9
Q

Slope calculation for speed time graph

A

slope= rise/run
= change in speed/change in time
=Vf-Vi / tf-ti
=acceleration

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10
Q

Speed time graph line meaning : Horizontal line

A

zero slope- constant speed (no acceleration)

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11
Q

Speed time graph line meaning: upwards line

A

positive slope- speeding up

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12
Q

Speed time graph line meaning: downwards line

A

negative slope- slowing down

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13
Q

Calculation for area under the line on a speed time graph

A

Area = length x width
= (v) x (t)
= distance

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14
Q

Scalar

A

magnitude only, how much or how far

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15
Q

Scalar examples

A

Time, mass, measure

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16
Q

Vector

A

Magnitude and direction, indicated by arrow above symbol

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17
Q

Vector examples

A

displacement, velocity, acceleration, force

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18
Q

Distance

A

Scalar quantity, measurement of how far an object has travelled
distance = xm + xm
= xm

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19
Q

Displacement

A

Vector quantity, measurement of the change in distance and direction (must use direction in the calculation)
displacement = xm (east) + xm (west)
= xm

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20
Q

North and up is a _____ direction

A

positive

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21
Q

East and right is a _____ direction

A

positive

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22
Q

South and down is a _____ direction

A

negative

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23
Q

West and left is a ______ direction

A

negative

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24
Q

Velocity

A

Change is displacement over time, vector quantity
V= d/t (With arrows over “V” and “d”)

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25
Formula for finding displacement (velocity)
d= V x t
26
Formula for finding time (velocity)
t= d/v
27
Acceleration is the change in _____ over time
velocity
28
Positive acceleration
1. Positive magnitude and positive direction (speeding up going north, east, up, or right) 2. Negative magnitude and negative motion (slowing down going south, west, down, or left)
29
Negative acceleration
1. Negative magnitude and positive direction (slowing down going north, east, up or right) 2. Positive magnitude and negative direction (speeding up going south, west, down or left)
30
Acceleration formula
a= v/t a= vf-vi/t acceleration= change in velocity
31
Find "t" for acceleration
t= vf-vi/a
32
Find "vf" for acceleration
Vf= (t x a) + Vi
33
Find "vi" for acceleration
vi= vf - (t x a)
34
Position time graph line of best fit will be a _____ curve
smooth
35
Speeding up on a position time graph is in the _____ direction
positive
36
Slowing down on a position time graph is in the _____ direction
negative
37
On a velocity- time graph positive slope=
positive acceleration
38
On a velocity - time graph, negative slope=
negative acceleration
39
On a velocity - time graph, area under the line determines
the displacement of the object
40
Area of a triangle formula
A = b x h/2
41
Area of a square/ rectangle
A= l x w
42
Inertia
The tendency to resist changes in motion
43
Force (and formula)
A push or pull on an object Formula = F= ma
44
Work (and formula)
When a force moves an object through a distance Formula = W= Fd W= joules or newton metres F= newtons d= metres
45
What 3 conditions must be met for work to be done?
Movement, force, force and distance the objects travel in the same direction
46
Energy
The ability to do work, measured in joules, work done to an object is equal to the energy gained by the object Formula= E= w
47
Evidence for presence of energy
- change in motion - change in shape -change in temperature
48
Light
from the sun and other light sources
49
Sound
sound released from vibrating object
50
Electrical
the work done by moving charges (ex. generator)
51
Thermal
Heat energy
52
Potential energy
stored energy ready to be released
53
Gravitational
lifting something up
54
Chemical
potential energy stored in the chemical bonds of compounds
55
Elastic
rubber band or string
56
Nuclear
potential energy stored in the nucleus of an atom
57
Kinetic
energy of moving object
58
Mechanical
the sum of the energy of the motion and position
59
Solar energy
sun energy
60
Types of potential energy
- gravitational - chemical - elastic - mechanical
61
Gravitational potential energy formula
Ep(grav) = mgh
62
Find "m" in gravitational potential energy formula
m= Ep/gh
63
Find "h" in gravitational potential energy formula
h= Ep/mg
64
Ep elastic energy formula
Ep= W OR Ep = Fd
65
Kinetic energy formula
Ek= 1/2 mv(squared) OR k mv(squared) / 2
66
Find "m" in Ek formula
m= 2Ek / v (squared)
67
Find "v" in Ek formula
v= square root 2Ek / m
68
Mechanical Energy
the energy due to motion and position of an object
69
Em formula
Em= Ep + Ek
70
Find Ep in Em formula
Ep= Em- Ek
71
Find Ek in Em formula
Ek= Em - Ep
72
Law of conservation of energy
- The total amount of energy remain constant as energy is converted from one form to another - Total mechanical energy always remain constant - Energy is always conserved
73
1st law of thermodynamics
- Energy is never created or destroyed - The total energy, including heat in a system and its surroundings remains constant
74
2nd law of thermodynamics
- During some energy conversions, some useful energy is lost as thermal energy in most cases - Heat flows from matter at a higher energy level to matter at a lower energy level
75
Efficiency formula
Eff= useful energy output / total energy input x 100

Science (12 decks)

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