Noting the "old school" coordinate system given, what is the $x$ component of the vector shown? Is your calculator in the mode you want to work with?

C$)1\mathrm{.}9m\frac{i}{h}r$

D$)-1\mathrm{.}9M\frac{i}{h}r$

E$)$ None of these

$2$ A knight on a chessboard moves two squares forward and one square to the right. If each square is $4$ cm on a side, what is the magnitude of the displacement vector for this move? $[$Assume that the knight begins and ends in the center of its square.$]$

A$)$ About $4\mathrm{.}5$ cm

B$)$ About $8\mathrm{.}9$ cm

C$)12$ cm

D$)$ About $5\mathrm{.}6$ cm $.$

E$)$ About $7\mathrm{.}8$ cm

$3$ Christina is an avid cross$-$country skier. On the first day of her trip she travels $25$ km in a direction due east and sets camp for the night. The following day she travels another $25$ km due south and sets up camp. In the final day of her trip she skis $30$ km due north. What is her total displacement $($magnitude$)$ for the $3$day period?

A$)$ About $19\mathrm{.}6$ km

B$)$ About $30$ km

C$)$ About $22\mathrm{.}7$ km

D$)$ About $25\mathrm{.}5$ km

E$)$ Zero km

The positions of two cars $($labeled A and By are graphed at left. Answer the following two questions using the graph.

$4$ Which car travels further in $20$ seconds?

A$)$ Car A

B$)$ Car B

C$)$ Neither $($It$\text{'}$s the same$)$

Which car has the greater acceleration at $t=6sec?$

A$)$ Car A

B$)$ Car B

C$)$ Neither

$6$ A basketball player holds a basketball straight out, $1\mathrm{.}5$ m above the floor, and releases it$.$ It bounces off the floor and rises to a height of $1\mathrm{.}2$ m $.$ What is the ball's magnitude of velocity at the moment it leaves the floor?

A$)24\frac{m}{s}$

B$)17\mathrm{.}3\frac{m}{s}$

C$)8\mathrm{.}4\frac{m}{s}$

D$)4\mathrm{.}9\frac{m}{s}$

E$)3\mathrm{.}8\frac{m}{s}$