Unit test

Question 1

Sig Digs

Answer 1

count all digits 1-9 including zeros in between and after. No the zeros before the first 1-9 number. more helpful to put them into scientific notations

Question 2

Adding and Subtracting

Answer 2

Uses lowest amount of decimal points for final answer

Question 3

Multiplying and Dividing

Answer 3

Uses lowest amount of significant digits for final answer.

Question 4

how many metres are in a km

Answer 4

1000

Question 5

How many seconds are in a hour

Answer 5

3600

Question 6

Define Motion

Answer 6

change in position from a reference point

Question 7

Uniform Motion (uninterrupted)

Answer 7

An object traveling at a constant rate in a straight line

-Great for calculation but in real life it is impossible to maintain for long periods of time.

Question 8

Graphing

Answer 8

y axis is vertical
X axis is horizontal
Needs a title

Question 9

Manipulated Variable

Answer 9

The one that the experimenter changes
plotted horizontal on the x axis
seen increasing by regular intervals
Includes units

Question 10

Responding Variable

Answer 10

Is the one that the experimenter measures
Value depends on manipulated variable
Plotted on the vertical y axis
Will not be seen to increase by regular intervals

Question 11

Slope

Answer 11

Measures amount of steepness of a given line segment
Rise/Run or change in y/change in x
y2-y1/x2-x1

Question 12

Velocity formula

Answer 12

v= d/t 
d= vXt 
t= d/v

Question 13

Positive Slope

Answer 13

Will rise to the right

Question 14

Negative Slope

Answer 14

Will fall to the right

Question 15

Vertical lines on Graph

Answer 15

will have an infinite slope

Question 16

Higher Velocity, Lower Velocity and No change in Velocity

Answer 16

HV- Acceleration
LV- Deceleration
NCIV- steady speed the whole time

Question 17

Figuring Out Average Speed

Answer 17

Distance traveled/ Time elapsed
OR
d final-d Initial/ t final - d initial

Question 18

Km/h –> m/s

Answer 18

divide by 3.6

Question 19

m/s –> km/h

Answer 19

multiply by 3.6

Question 20

Speed

Answer 20

The rate at which something or someone is able to move or operate at

Question 21

Velocity Definition

Answer 21

The speed of something in a given direction (E)

-Change of displacement during a specific time

Question 22

Distance

Answer 22

The amount of space between two things

Question 23

Displacement

Answer 23

The movement of something from its original position. The amount travelled since the initial position.

Question 24

Scalar Quantity

Answer 24

measures the magnitude of something

EX- Speed

Question 25

Vector Quantity

Answer 25

Measurement that refers to the magnitude and the direction something has travelled. EX-Velocity

Question 26

Arrow on top of variable

Answer 26

the arrow indicates the referral of a vector quantity

Question 27

Acceleration

Answer 27

A change in velocity during a specific time -Is a vector quantity (has direction and amount) Acceleration will be squared in equations

Question 28

Positive Acceleration

Answer 28

-Both the change in magnitude of velocity and the direction are positive or negative Speeds up in right direction (right) Slows down in Wrong direction (left)

Question 29

Negative Acceleration

Answer 29

-The change in Magnitude of velocity is negative while the direction is positive or the other way around. EX- Gravity slow down in right direction (right) speed up in wrong direction (left)

Question 30

Formula for Acceleration

Answer 30

A= change in v/change in t

Question 31

Why cant acceleration be a negative number

Answer 31

because you cannot go back in time (realistically)

Question 32

Newtons 3 Laws

Answer 32

1. Every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by an action of external force 2. The velocity of an object changes when its subjected to an external force (FORCE MEASURED IN NEWTONS) 3. For every action/force in nature there is an equal and opposite reaction.

Question 33

Force

Answer 33

force = mass X acceleration. It is a vector quantity so its acts in a direction. since a= v/t.....f=m X v/t

Question 34

Work

Answer 34

Work is expressed in the units of Joules. Work measure how far you have travelled from your initial position. W= f X d W also equals the change in energy

Question 35

How many KJ are in a J

Answer 35

1000

Question 36

Gravitational Potential Energy

Answer 36

The energy that is stored caused by being in a resting position. m X h X g

Question 37

Kinetic energy

Answer 37

potential energy converts into kinetic energy once in motion and the energy is no longer stored. EK = 1/2mv2

Question 38

Gravity on earth

Answer 38

9.81m/s2

Question 39

gravity on earth compared to gravity on the moon and Jupiter

Answer 39

the moons gravity is slower around 1.6m/s2 and the gravity on Jupiter is higher around 24.8m/s2.