ANSWERS TO QUESTIONS FOR THE DAY

1. A car is traveling at the speed of 20 mph. How far will it travel in 5 hrs?
A. 4 mi
B. 100 mi  (distance = speed x time; 20 mph x 5 hrs= 100)
C. 20 mi
D. 25 mi

2. A car is traveling at the speed of 20 mph. How far will it travel in 30 minutes?
A. 600 mi
B. 50 mi
C. 10 mi (distance = speed x time; change 30 minutes to hours first, then 20 mph x 0.5 hrs= 100)
D. 15 mi

3. What is the distance traveled in 5 seconds by the car whose graph is shown below?

A. 10 m
B. 50 m (The distance is the area under the graph from 0-5 s, this is a triangle so Area=1/2 x 5 x 20 = 50)
C. 100 m
D. 20 m

Use the graph below to answer the following questions.



4. During which time interval is the object decelerating?
A. 12-16 s
B. 4-10 s
C. 0-2 s
D. 10-12 s

5. During which time interval is the object accelerating?
A. 12-16 s
B. 4-10 s
C. 0-2 s
D. 10-12 s

6. During which time interval is the object moving with a constant speed?
A. 2-10 s
B. 4-10 s
C. 0-2 s
D. 10-12 s

7. During which time interval did the object travel the greatest distance?
A. 2-10 s (The distance is the area under the graph. You can estimate this using the number of boxes)
B. 4-10 s
C. 0-2 s
D. 10-12 s

7. During which time interval did the object travel the shortest distance?
A. 2-10 s
B. 12-16 s
C. 0-2 s The distance is the area under the graph. You can estimate this using the number of boxes)
D. 10-12 s

8. An object travels a distance of 15 meters when an force of 4 N  act on it. What is the work done?
A. 30 J
B. 19 J
C. 60 J (Work = force x distance)

D. 11 J