Unit B: Energy Flow in Technological Systems | Outcome B2 | L1-L10

Question 1

Define:

Scalar Quantities

Answer 1

Measurement that include a magnitude (#) and a unit only

Examples: time, distance and speed.

Question 2

Define:

Vector Quantities

Answer 2

Measurements that includes magnitude (#), units, AND a direction (9.81 m/s2 [E])

Examples: Acceleration, displacement and velocity

Question 3

What does an arrow over a variable represent?

Or a diagram as a line with arrow pointing in a direction

Answer 3

A Vector Quantity

Question 4

Regarding the direction of vectors:

What value can North [N] and East [E] be substituted for?

Answer 4

A positive value

Question 5

Regarding the direction of vectors:

What value can South [S] and West [W] be substituted for?

Answer 5

A negative value

Question 6

What does distance describe and what untis does it use?

Answer 6

The total length of a path taken. Usually measured in meters (m).

Units can also be: km, feet, steps, etc

Question 7

What does position describe?

Answer 7

The position of an object in distance and direction from a
reference point (ex. “home base”)

Denoted by the symbol ‘’ and found with units of distance

Question 8

What does displacement describe?

Answer 8

Described the straight-line distance from one point to another

Uses units of distance

Question 9

Is Position/Displacement a Scalar or Vector quantity?

Answer 9

Vector

Question 10

How do you calculate displacement of an object travelling in ONE direction?

Answer 10

∆d = d_{f - di}

• d_{f = final position}
• d_{i = initial position}
• ∆d = change in displacement

Question 11

If you are using vestors, should you always include direction in your answer?

Answer 11

Yes!

Question 12

How do you calculate displacement of an object that changes directions along the same axis?

For instance: North and South or East and West. NOT South and West.

Answer 12

∆d = d_{1 + d2…}

Change direction to values before calculating. (Ex. 25m[S] = -25m)

Question 13

How do you calculate displacement of an object that changes directions along different axis?

Answer 13

1. Draw a diagram of the distance travelled (using the correct directions)
2. Create a line between the starting point and the ending point
3. Use the pythagorean theorem to find displacement

*Only works if object travels in straight lines

Question 14

What is Uniform Motion

Answer 14

The motion of an object where the rate at which the object
moves is constant throughout the motion

EX. A car traveling 100 km/h on Deerfoot trail

Question 15

What is Speed?

And what type of quantitiy is it?

Answer 15

• The change in distance over a specified time interval

Scalar Quantity

Question 16

What is the formula for speed?

Answer 16

𝑣 = ∆𝑑 / ∆𝑡

= speed (m/s)
= distance (m)
= time (s)

*you can isolate variables to get new equations that can solve for something else. For instance: ∆𝑑 = ∆t * v

Question 17

When solving Physics problems:

What does GRASP stand for?

Teacher looks for these steps when you show your work

Answer 17

• G: Given (State all given quantitiites)
• R: Required (What are you looking for?)
• A: Analysis (What formula/equation do you need to use?)
• S: Solve (Input given quanties into formula to solve for required)
• P: Paraphrase (Change your final answer depending on sig digs)