# Chapter 1 Section 2: Introduction

8 Questions | Total Attempts: 110  Settings  Related Topics
• 1.
• A.

(a) Yes. (b) No

• B.

(a) Yes. (b) Yes

• C.

(a) No (b) Yes

• D.

(a) No. (b) No

• 2.
You can always add two numbers that have the same units (such as 6 meters + 3 meters). Can you always add two numbers that have the same dimensions, such as two numbers that have the dimensions of length [L]?
• A.

True

• B.

False

• 3.
The following table lists four variables, along with their units: Variable Units x Meters (m) v Meters per second (m/s) t Seconds (s) a Meters per second squared (m/s2) These variables appear in the following equations, along with a few numbers that have no units. In which of the equations are the units on the left side of the equals sign consistent with the units on the right side?
• A.

• B.
• C.
• D.
• E.
• F.
• 4.
In the equation you wish to determine the integer value (1, 2, etc.) of the exponent n. The dimensions of y, a, and t are known. it is also known that c has no dimensions. Can dimensional analysis be used to determine n?
• A.

Yes

• B.

No

• 5.
Which of the following statements, if any, involves a vector?
• A.

I walked 2 miles along the beach.

• B.

I walked 2 miles due north along the beach.

• C.

I jumped off a cliff and hit the water traveling at 17 miles per hour.

• D.

I jumped off a cliff and hit the water traveling straight down at a speed of 17 miles per hour.

• E.

My bank account shows a negative balance of -25 dollars.

• 6.
Two vectors are added together to give a resultant vector. The magnitudes are 3 m and 8 m, respectively, but the vectors can have any orientation. What are (a) the maximum possible value and (b) the minimum possible value for the magnitude of?
• A.

(a) 11 m

• B.

(a) 15 m

• C.

(b) 5 m

• D.

(b) 3 m

• 7.
Can two nonzero perpendicular vectors be added together so their sum is zero?
• A.

Yes

• B.

No

• 8.
Can three or more vectors with unequal magnitudes be added together so their sum is zero?
• A.

Yes

• B.

No