3. Vectors

In the context of vectors, which of the following best describes the angle $\theta$ between two vectors $A$ and $B$?

Which of the following best describes vectors with an $x$ component of zero?

Which of the following correctly represents the vector sum $A+B$ if $A$ and $B$ are two vectors shown tail-to-head in the figure?

Rosa uses the formula $vi\left(\cos \right)t$ to do a calculation. Which value is Rosa most likely trying to find?

Why is a minimum of $3$ seismic stations needed to find the epicenter of an earthquake?

Three point charges are placed along the x-axis at positions $3$ cm, $8$ cm, and $11$ cm. If the charges are $\mathrm{+2}$ $\mu C$ at $3$ cm, $-3$ $\mu C$ at $8$ cm, and $\mathrm{+1}$ $\mu C$ at $11$ cm, what is the direction of the net electric force on the charge at $8$ cm due to the other two charges?

Given two vectors $\overrightarrow{e}$ and $\overrightarrow{f}$ as shown in Figure 2, what is the angle $\pi$ between them if $\overrightarrow{e}$ points along the positive x-axis and $\overrightarrow{f}$ points along the positive y-axis?

Which of the following vectors is equal to the cross product $r\times ab$?

Which of the following quantities is a vector?

In the context of $\mathrm{vectors}$ and motion, what is a reference point and what is its primary function?

In the context of vector operations, which two vector quantities were used as examples in the video?

A cyclist travels $3$ km east and then $4$ km north. What is the straight-line distance from the starting point to the cyclist's final position?

An object is placed in front of a thin converging lens. Which of the following statements correctly describes the nature of the image formed when the object is located at a distance greater than twice the focal length from the lens?$d>2f$

Which vector quantity was historically used to help sailors determine direction at sea?

An underwater diver sees the sun at an angle of $60°$ above the horizontal. Assuming the refractive index of water is $1.33$ and that of air is $1.00$, what is the actual angle of elevation of the sun above the horizontal as seen by an observer in air?