Physics 1308

Online Quiz 2

If you complete all of the practice quizzes during the semester, you may replace your lowest two in-class quizzes with the highest average of all your on-line quizzes. Since you may take the practice quizzes as often as you like, your highest average should be pretty good. However, in order to keep track, you must fill out the student name and id# part of the form.

Question 1. If average speed = distance/time, then for a 5-hour trip where you travelled 250 miles, your average speed was
(a) 0 mph,    (b) 25 mph,    (c) 50 mph,    (d) 5 mph,    (e) 120 mph.

Question 2. For the trip mentioned above, would the speedometer have to read a constant speed for the entire trip?
(a) yes     (b) no

Question 3. For the trip mentioned above, could the speedometer have read a constant speed for the entire trip?
(a) yes     (b) no

Question 4. If the average acceleration = change in velocity/time, then for a car that starts from rest and attains a velocity of 25 km/hour in 5 seconds, the average acceleration (in km/hour/second) is
(a) 0     (b) 5     (c) 10     (d) 25     (e) 50

Question 5. The average acceleration of a car that maintains a constant velocity of 100 km/hour for 10 seconds (in km/hour/sec) is
(a) 0     (b) 5     (c) 10     (d) 25     (e) 50

Question 6. During the first two seconds, a freely falling object released from rest near the surface of the earth will fall a distance (in m) of
(a) 0     (b) 5     (c) 10     (d) 20     (e) 50

Question 7. By the end of the first two seconds, a freely falling object released from rest will attain a speed (in m/s) of
(a) 0     (b) 5     (c) 10     (d) 20     (e) 50

Question 8. A ball is thrown straight up with an initial speed of 20 m/s. Neglecting air resistance, the ball will rise to a height above its release point (in m) of
(a) 5     (b) 10     (c) 20     (d) 40     (e) 45

Question 9. Neglecting air resistance, the ball in the previous question will return to its release point with a speed (in m/s) of
(a) 5     (b) 10     (c) 20     (d) 40     (e) 45

Question 10. How far (in m) does the runner whose velocity-time graph is shown below travel in 16 s?
(a) 4     (b) 16     (c) 60     (d) 80     (e) 100

 First Name: Last Name: ID#: