1.
A car is traveling at 30. meters per second. How much distance does it cover in 1 second?

In 2 seconds? In
a minute?

2. a/ A jet
ski moves 280 meters north in 6.3 seconds.
What is its speed?

b/ What is its velocity?

3. a/ A bicycle moves at 15 m/s east for 2.5
seconds. What distance does it
travel?

b/ What is its displacement?

4. If a car travels
at 35 m/s, how much time does it take to travel 2 km? (Hint:
You MUST change the km to meters before doing the math!)

5. Two cars, each
traveling at 50 mph, are heading in opposite directions. Compare their speeds and velocities.

6.
See page 1 of the

*Reference Tables*to find the speed of sound in air at STP = ________ m/s
How far does sound travel in air in 5.0 s?

7.
See page 1 of the

*Reference Tables*to find the speed of light in a vacuum = ______________ m/s
How much time does it take light to travel 30 cm (30 x 10

^{-2}m), which is about 1 foot?
8.
a/
If car A travels twice as far as car B in the same time, how does

*v*compare to_{A}*v*?_{B}
What if car A travels three times as far?

Is speed related

*directly*or*inversely*to distance (if time is constant)?
b/
If car X takes twice as much time as car Y to travel the same distance,
how does

*v*compare to_{X}*v*?_{Y}
What if car X takes three times as much
time?

Is speed related

*directly*or*inversely*to time (if distance is constant)?
9. A car travels 90.
meters due north in 15 seconds. Then
the car turns around and travels 40. meters due south for 5.0 seconds.

a/ Remember that average speed = distance /
time. Find the average speed in the
first 15 seconds alone.

b/ Now find it for only the last 5.0 seconds.

c/ Now find it for the entire 20. seconds. (Hint: Use total distance.)

d/
Why does your third answer NOT equal the average of your first two?

e/ Find the average

*velocity*in the first 15 seconds. Remember that average velocity =**displacement**/time, so your answer will have a direction.
f/ Now find average velocity during the last
5.0 seconds.

g/ Now
over the entire 20. seconds. (Hint: Use
the resultant displacement over the entire 20 s.)

h/ Why is your average velocity (part g/) so
different from your average speed (part c/)?