Name ______

Class Period ______

Due date ______

IPC Homework #2

1. What would a researcher use to show comparisons between variables?

A. Hypothesis

B. Word-processing program

C. Conclusion

D. Graph

2. The ______is plotted on the x-axis of a line graph?

3. If a car is traveling 10 km/h and comes to a stop in 0.05 hour, what

is the acceleration of a passenger who is inside the vehicle wearing a seatbelt?

4. Which of the following statements is true?

A. If a moving object slows down, its acceleration is negative.

B. An object accelerates if it maintains a constant speed.

C. Velocity of a moving object is the distance traveled divided by the time needed to travel the distance.

D. Friction is the pull that all objects exert on one another.

5. Which of the following is NOT an example of acceleration?

A. Slowing your bike so you can make it up a hill

B. Stopping your bike at an intersection

C. Riding your bike faster when you head down a hill

D. Riding your bike straight down the street at a constant speed

6. The following terms and phrases refer to the two axes of a graph.

Divide the terms and phrases according to which group they belong in.

7. Does the speedometer of a car give you the average speed or the instantaneous speed of the car? ______

8. You bike from your house to school, covering a distance of 5 km in 15 min. What is your average speed? Give your answer in kilometers per hour. ______

9. The slope of a position vs. time graph is equal to ______.

10. Arrange the four points on the distance vs. time graph in order from slowest to fastest

11. Match each of the three distance vs. time graphs with the corresponding speed vs. time graph. All three distance vs. time graphs contain only straight-line segments.

12. Calculate speed from the position vs. time graph on the left.

Speed= ______

13. What is the acceleration of a car that is going straight at a steady speed of 60 mph?

14. Does a car accelerate when it goes around a corner at a steady speed? Explain your answer.

15. A swimmer speeds up from 1.1 m/s to 2.8 m/s during the last 20 s of a workout. What is the swimmer's acceleration during this time interval?

16. In which of the following situations does the car not accelerate:

  • The car slows from 80 km/h to 35 km/h.
  • The car speeds up from 35 km/h to 80 km/h.
  • A car moves at 80 km/h on a flat, straight highway.
  • The car turns a corner.

17. A car rolling down a ramp starts with a speed of 50 cm/sec. The car keeps rolling and 0.95 seconds later the speed is 150 cm/sec. Give the acceleration of the car during this time period.

18. A turtle is moving in a straight line at a steady speed of 15 cm/sec. for 3 hours. How far did the turtle travel?

19. Acceleration can occur when a car is moving at constant speed. What must cause this acceleration? ______

20. A bicyclist traveling at 30 miles per hour, rides for a total of 48 miles. How long did it take her to travel this distance at this speed?

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