Schmidt 1 Name Period Date
STUDY GUIDE
1. The velocity of a car is determined by its and its . 2. In which of these units can density be expressed? a. milliliters per gram b. grams per liter c. milliliters per meter d. cubic centimeters per gram 3. After a bus left a bus station, it began to move at a faster rate. What happened to the velocity of the bus? . 4. During her winter vacation, Karen hiked for 60 km, rode a boat for 100 km, and drove in a car for 320 km. Each activity took her 2 hours to complete. What is Karen’s average speed? . 5. What is the direction and size of the buoyant force acting on an ice cube floating in water?
. 6. During a race, Oscar reached a higher top speed than Anesto, but Anesto won the race. What must have happened for Anesto to win?
. 7. What is the formula for Density? . 8. Katherine threw marbles at a target. The marbles were the same volume, but one marble had a greater mass than the other. If thrown in the same way with equal force, which one had the greatest acceleration? Which one had the least acceleration?
. 9. Mr. Schmidt gave his students directions: Walk at a 90 degree angle from the front door of Room 119 until you enter the quad. 15 meters from the door you will find an envelope with the next directions What additional information do Mr. Schmidt’s students need to find the envelope? . Schmidt 2 10. Jasmine is riding a bicycle. When Jasmine applies force to the pedals, she begins to move forward. What combination of forces acts in the opposite direction of the bicycle’s forward motion?
. 11. Traveling down a straight road, a car changed velocity while its speed remained constant. What caused this to happen? . 12. Andrew released a block of iron and a block of ice at the same time from the top of a slide. Which block would reach the bottom first, and why?
. 13. A lady bug crawls 10 meters up a tree in 5 hours. What is the lady bug’s average speed? . 14. In which example can velocity be determined? a. Brian walks 10 km per hour. b. Erick drives for 200 km. c. Adrian travels Northeast at 50 km per hour. d. Joceline travels Southwest for 100 km. 15. An object will float in water if it has . 16. What information do you need to know to predict whether an object will float in a liquid? . 17. Label the forces acting on the apple to make it stationary.
18. The table below shows the results of an experiment that had identical ramps and identical marbles. Each student rolled a marble down the ramp and measured the distance. What might have affected the results?
. Student Distance Marble Traveled Aidee 9.6 meters Rolando 12.5 meters Alphonso 9.4 meters Joyce 9.3 meters Schmidt 3 19. Scientists want to find the density of a 30 gram rock. After the rock was dropped into a 20 ml graduated cylinder the volume increased by 6 ml. What is the density of the rock?
. 20. Jeanette placed a glass of orange juice on a ramp. The glass of orange juice did not move. Why did the orange juice stay at the top of the ramp?
. 21. A lady bug traveled 12 meters in 30 seconds. How far would the lady bug travel in 60 seconds? . 22. Mr. Slavinsky’s coffee mug is resting stationary on his table. Why is the mug stationary?
. 23. An ant crawled up a tree. The graph below shows how the ant’s height on the tree changed with time. Based on the slope of the line, how far will the insect have traveled in 60 seconds? .
Distance vs. Time
14
) 12 s r e t 10 e m 8 n i (
e 6 c n a
t 4 s i
D 2 0 0 5 10 15 20 25 30 Time (in seconds) Schmidt 4 FOR NUMBERS 24-27 USE THE GRAPH BELOW
24. During what interval did the car move at a constant speed? How do you know?
. 25. At what time did the car reach the greatest speed?
. 26. Explain how to determine when the car reached the greatest speed?
. 27. What was the average speed of the car as it moved along the 120 meter road?
.
Distance vs. Time
140
) 120 s r e t 100 e m 80 n i (
e 60 c n a
t 40 s i
D 20 0 0 5 10 15 20 25 30 35 40 45 Time (in seconds)
28. Jeff went running. The farther Jeff traveled from his starting point, the slower he jogged. Draw a distance vs. time graph that best shows Jeff’s speed while running. Schmidt 5
acceleration force inertia net force balanced forces newton motion mass velocity speed unbalanced forces point of reference Definitions 1. A push or pull that causes an object to move, stop, or change direction
2. the amount of matter in an object 3. object’s speed in a particular direction 4. the unit used for force 5. A change in motion caused by unbalanced forces or a change in velocity 6. the forces acting on an object that are equal in size and opposite in direction, canceling each other out 7. A measure of how hard it is to slow down or stop an object 8. forces that are not equal 9. a seemingly stationary spot that is observed in order to tell if an object is moving 10. The combination of forces acting on an object 11. An object’s change in position relative to a reference point 12. A measurement of distance over time
13. Distance = 3,000 m; Average Speed = 500 m/min; Time = min
14. Average Speed = 3,200 m/hr; Time = 4 hours; Distance = m
15. Average Speed = 200 km/hr; Distance = 800 km; Time = hrs
16. The Flash accelerates from 360 m/s to 1,200 m/s in 4 seconds. What is the acceleration? ______