Physics 10

Question 1

Lesson 1: How do you do unit conversions?

Answer 1

What you want goes on top.
Use the metric conversion sheet (each step is another multiple of 10)
Ex. Convert 81 hours into seconds
81 hours (60min)(60sec)
——— ———
1 Hr 1 Min
Cross out the units that correspond to another in the equation.
Multiply or divide as needed.
Like in the example, if there are multiple things to do to convert to your final product, set them all up together. Remember that no matter what, what you want goes on top (criss cross it).

Question 2

Lesson 3: How to calculate slope

Answer 2

Slope = rise/run
m = y2-y1/x2-x1
Remember to include units in your equation to help you remember to keep them.
Always choose points directly touching the line.
Remember that it won’t always be going up by one.

Question 3

Lesson 4: What are scalars?

Answer 3

Things that are described using a magnitude (a number) with units.

Question 4

Lesson 4: What are vectors?

Answer 4

Things that are described using a magnitude (a number) with units, AND a direction. (Hint: look for the direction to help you).

Question 5

Lesson 4: What is position?

Answer 5

Where you or an object is located at a specific place in time in respect to a reference location.
In m.
-
(d)

Question 6

Lesson 4: What is distance?

Answer 6

How far you travelled in total - the direction does not matter.
In m.
(d)

Question 7

Lesson 4: What is displacement?

Answer 7

Your change in position in total - do not include the directions you travelled, only where you started and stopped.
Change in displacement=position2-position1
Direction in meters. (5m[N])

Question 8

Lesson 4: What is time?

Answer 8

The time interval between two points.
Change in time = time2-time1
In seconds.

Question 9

Lesson 4: Speed

Answer 9

Speed is a scalar
Describes how quickly an object is moving -covering a distance over an amount of time.
V

Question 10

Lesson 4: Velocity

Answer 10

Velocity is a vector.
describes how quickly there is a change in position over an amount of time including direction.
-
V

Question 11

Lesson 5: Three types of uniform motion

Answer 11

No motion (straight line)
Uniform motion up. forward, or right
Uniform motion down, backward, or left

Question 12

Lesson 6: Position time graphs

Answer 12

Tell you were an object is located over a period of time.
The slope tells you how fast it is moving.
You can read positions, Displacements, and average velocity (slope).
As well as the distance if you add up all the line segments without mattering the distance.

Question 13

Lesson 7: Acceleration

Answer 13

Measure of change in velocity of an object.
Any change is considered acceleration, even if it slows down (negative acceleration)
A=acceleration
Write out all of the variables you know and figure out what you need to know in order to find the proper equation.

Question 14

Lesson 8: Velocity time graphs

Answer 14

Like how the slope of a position time graph gives you average velocity, the slope of a velocity time graph gives you average acceleration of an object.
You can find three things: The velocity at any given time, the average acceleration (slope), and the displacement.

Question 15

Lesson 8: How to find displacement with a velocity time graph

Answer 15

You must find the area underneath the graph and between the x-axis.
You will have to chunk out your sections to make triangles (A=1/2(bxH) and rectangles (A=LW).

Question 16

Lesson 9: Examples of scalars

Answer 16

Time
Temperature
Mass
Density
Length
Distance
Speed

Question 17

Lesson 9: Examples of Vectors

Answer 17

Position
Displacement
Velocity
Acceleration
Force
Remember to always include a direction for these.

Question 18

Lesson 9: Tip to tail method

Answer 18

This method is used to calculate vector addition.
You start at the origin of your graph and follow the numbers and directions given to find displacement. Locate your end result to find displacement. To find total distance, you must just add all the numbers in total.

Question 19

Lesson 9: Vector addition - displacement

Answer 19

N and E are positive, S and W are negative.
Group the vectors by x and y, and if they are positive and negative.
Add/subtract each based on if it is positive or negative.
Use pythagorean theorem to determine the final answer.
resultant 2 = Xtotal2 + Ytotal2

Question 20

Lesson 9: Vector addition - distance

Answer 20

Add all the vectors together.

Question 21

Lesson 10: Forces

Answer 21

Forces are any push or pull that one object exerts on another. Forces are Vectors. Measured in Newtons (N).

Question 22

Lesson 10: Types of forces

Answer 22

Contact
Non-contact

Question 23

Lesson 10: Contact forces

Answer 23

Objects directly interacting by touching (friction, tension)

Question 24

Lesson 10: Non-contact forces

Answer 24

Objects that indirectly interact at a distance; no touching. (gravity, magnetism)

Question 25

Lesson 10: resistive forces

Answer 25

Always oppose the direction of motion - acting against another force. - Friction (stops things from sliding) - Air resistance (friction with respect to the air) - Normal force (contact force that often opposes gravity e.g. chair)

Question 26

Lesson 10: Net force

Answer 26

The sum of all the forces acting on an object. This tells us whether or not an objects motion will change. Label directions on your box representing the object and their integer (+, -) Draw the forces (always AWAY) Add the x and y Do pythagorean theorem to find the total force.

Question 27

Lesson 10: Balanced vs Non-balanced forces

Answer 27

Balanced: Net force = 0 and motion will not change. Unbalanced: Net force is not 0 and the motion will change

Question 28

Lesson 11: Newtons Laws

Answer 28

Set of laws that predict and describe the ways objects will interact.

Question 29

Lesson 11: Newton's first Law

Answer 29

"Law of Inertia" An object will remain in its current state of motion (stationary or constant speed) until it is acted upon by an unbalanced force. - If we want to change our motion, we must apply a force.

Question 30

Lesson 11: Newtons second Law

Answer 30

If force is applied to an object, that object will accelerate. Fnet = ma M=mass in kg a= acceleration. Unbalanced forces cause acceleration. If the Fnet = 0. then acceleration must also =0 because the mass can't be nothing.

Question 31

Lesson 11: Newtons third Law

Answer 31

Action - Reaction Equal and opposite reactions. If a force is exerted on an object, an equal force is exerted back in an opposite way. For every action, there is an equal and opposite reaction. ex. Gunshots. If someone shoots their rifle, it pushes them back.