#$1$ Average Velocity

Mat and Tam embark on a weekend journey with four stages. First, they drove due East

for exactly two and a half hours at a speed of $80$ kilometers per hour. Then, they visited a

park for exactly one hour. Impatient to get to their destination, but regrettably disoriented,

they traveled due West for $30$ minutes at speed of $100$ kilometers per hour. Finally, realizing

their error, Mat and Tam completed their journey by traveling due East at a speed of $110$ kilometers per hour for exactly three hours. What is Mat and Tam$$s net displacement over the course of the journey?

A$.240$ km

B$.320$ km

C$.480$ km

D$.580$ km

#$2$ Average Velocity

In #$1,$ what is the average velocity $($i$.$e$.$ magnitude and direction$)$ of Mat and Tam?

A$.68\mathrm{.}6$ kilometers per hour

B$.78\mathrm{.}1$ kilometers per hour

C$.89\mathrm{.}2$ kilometers per hour

D$.96\mathrm{.}0$ kilometers per hour

$1$

#$3$ Acceleration and Velocity

A mass has an initial velocity of $3\mathrm{.}2$ m$/$s$,$ is uniformly accelerated at a rate of $2\mathrm{.}5$ m$/$s$^2$

What is the velocity of the object for t $=2\mathrm{.}4$ s$?$

A$.1\mathrm{.}2$ m$/$s

B$.2\mathrm{.}8$ m$/$s

C$.2\mathrm{.}8$ m$/$s

D$.3\mathrm{.}6$ m$/$s

#$4$ Displacement and Gravitational Acceleration

An object is released from rest in the presence of gravitational acceleration, where g $=$

$9\mathrm{.}8$ m$/$s$^2$

$.$ What is the change in displacement of the body if $5\mathrm{.}8$ seconds elapse? Use a $=$g

A$.-85$ meters

B$.-123$ meters

C$.-165$ meters

D$.-245$ meters