4. Leaving home, Mr. L walks 4 miles, West, past the hospital to his office in 45 minutes. Feeling short of breath, he walks back East 1 mile in 15 minutes to the hospital for a check-up.

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What was his average velocity for the entire trip?

4 miles/hour
54 miles/hour, West\
3 miles/hour, West
\0.05 miles/minute, West
33 miles/hour
5 miles/hour, West
1 mile/hour, East
5 miles/hour
1 mile/hour

5. Sometimes the numerical part of an acceleration is given as a negative number. How is a negative acceleration different from a positive acceleration?

6. Is the object accelerating in the following example? Choose yes or no and an explanation.


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A motorcycle speeds up from rest.

yes
yes, decrease in velocity
change in direction
no
increase in velocity
no, no change in direction or velocity
decrease in velocity
yes, increase in velocity
yes, change in direction

7. Is the object accelerating in the following example? Choose yes or no and an explanation.


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A car slows to a stop for a red light.

yes
yes, decrease in velocity
change in direction
no
increase in velocity
no, no change in direction or velocity
decrease in velocity
yes, increase in velocity
yes, change in direction

8. Is the object accelerating in the following example? Choose yes or no and an explanation.


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A boat cruises in a straight line at 30 knots.

yes
yes, decrease in velocity
change in direction
no
increase in velocity
no, no change in direction or velocity
decrease in velocity
yes, increase in velocity
yes, change in direction

9. Is the object accelerating in the following example? Choose yes or no and an explanation.


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A boat, still traveling at 30 knots, turns around and heads back.

yes
yes, decrease in velocity
change in direction
no
increase in velocity
no, no change in direction or velocity
decrease in velocity
yes, increase in velocity
yes, change in direction

10. A descendant of Galileo drops a bowling ball, baseball, and crow's wing feather from the top of the Leaning Tower of Pisa.


Tell which of the objects hits first, second, and third.

Explain your answer.

11. A car is traveling along at 50 mph, according to the speedometer. Thelma is driving and Louise is in the passenger's seat.

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What is Louise's speed from Thelma's point of view (frame of reference)?



50 miles/hour
not enough information to tell
over 100 miles/hour
0 miles/hour
100 miles/hour
between 0 miles/hour and 50 miles/hour
between 50 miles/hour and 100 miles/hour

12. Explain your answer to question #11.

13. A car is traveling along at 50 mph, according to the speedometer. Thelma is driving and Louise is in the passenger's seat.

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Wayne is standing at the curb as the car passes him. What is Louise's speed from Wayne's frame of reference?

not enough information to tell
between 50 mph and 100 mph
100 mph
50 mph
between 0 mph and 50 mph
over 100 mph
0 mph

14. Explain your answer to #13.

15. A car is traveling along at 50 mph, according to the speedometer. Thelma is driving and Louise is in the passenger's seat.

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A police helicopter is hovering directly over the car as it moves along. What is Louise's speed from the pilot's frame of reference?

over 100 mph
between 0 mph and 50 mph
not enough information to tell
50 mph100 mph
between 50 mph and 100 mph
0 mph

16. Explain your answer in #15.
I know its alot I know i should do this myself Ireally need help badly my mom or myself cannot get the answers HELP ME PLEASE!!!!!!!!!!!! I AM BEGGING YOU PLEASE