Physics Unit Review

What is the primary characteristic of a vector quantity?

• It has magnitude only

• It has direction only

• It has both magnitude and direction

• It has neither magnitude nor direction

If you start on your way to school walking 38m [N] and then realize you forgot your lunch, so you walk back to your house 38m [S]. What is your resultant vector?

• 76m [N]

• 76m [S]

• 76m [NS]

• 0m [N]

How many significant figures are in the number 0.00340?

• 2

• 3

• 5

• 6

How many significant figures are in the number 0.10005?

• 2

• 3

• 5

• 6

Which of the following best describes acceleration?

• The total distance traveled by an object

• The rate of change of displacement

• The rate of change of velocity

• The time taken to complete a journey

Which is a valid unit for acceleration?

• m/s

• m/s²

• km/h

• m²/s

Which is a valid unit for speed/velocity?

• m/s

• m/s²

• s/m

• m²/s

The answer to this subtraction statement with the correct number of significant figures is: 13.89 - 2.33

• 11.56

• 11.6

• 11

• 10

The result of this subtraction with the correct number of significant figures is: 15.678 - 3.45

• 12.228

• 12.23

• 12.2

• 12

Newton's Third Law states that for every action:

• There is an equal reaction

• There is an opposite reaction

• There is an equal and opposite reaction

• There is no reaction