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Study Island

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Generation Date: 01/22/2013

Generated By: Bill Wieners

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1. Tyler kicks a soccer ball toward the opposite side of the field. If the ball moves at a constant speed, which graph shows the position of the ball relative to Tyler through time?

|[pic] |[pic] |

|W. |X. |

|[pic] |[pic] |

|Y. |Z. |

|[pi|A. |Z |

|c] | | |

|[pi|B. |X |

|c] | | |

|[pi|C. |W |

|c] | | |

|[pi|D. |Y |

|c] | | |

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2. Starting from his house, Reid rode his bike 300 m to the north, then 100 m to the east.

Which of the following vector diagrams shows Reid's path? (Note: The height and width of each square in the grids is 100 m.)

|[pic] |[pic] |

|W. |X. |

|[pic] |[pic] |

|Y. |Z. |

|[pi|A. |Y |

|c] | | |

|[pi|B. |X |

|c] | | |

|[pi|C. |Z |

|c] | | |

|[pi|D. |W |

|c] | | |

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3. _______ can be generally defined as a change in position.

|[pi|A. |Motion |

|c] | | |

|[pi|B. |Volume |

|c] | | |

|[pi|C. |Mass |

|c] | | |

|[pi|D. |Force |

|c] | | |

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4. Barry knocks a baseball into the air with his bat.

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Shortly after the ball is hit, it is traveling at 25 m/s to the east and parallel to the ground. After two seconds, the ball is 50 meters to the east of Barry.

Which of the following best describes the ball's direction of motion?

|[pi|A. |2 s |

|c] | | |

|[pi|B. |25 m/s |

|c] | | |

|[pi|C. |east |

|c] | | |

|[pi|D. |50 m |

|c] | | |

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5. Ginny wants to use an ax to chop wood for a fire. The head of an ax is a wedge that cuts into wood and breaks it apart. Which of the following ax-head designs will require the least amount of effort force to chop wood?

|[pic] |[pic] |

|W. |X. |

|[pic] |[pic] |

|Y. |Z. |

|[pi|A. |Z |

|c] | | |

|[pi|B. |W |

|c] | | |

|[pi|C. |Y |

|c] | | |

|[pi|D. |X |

|c] | | |

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6. _______ measures an object's change in position per unit time.

|[pi|A. |Force |

|c] | | |

|[pi|B. |Distance |

|c] | | |

|[pi|C. |Acceleration |

|c] | | |

|[pi|D. |Speed |

|c] | | |

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7. Emma is hiking. She travels more slowly through some areas of the trail than through others. The graph below shows the distance Emma traveled with time.

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What is Emma's average speed on her hike?

|[pi|A. |25 km/hr |

|c] | | |

|[pi|B. |7.5 km/hr |

|c] | | |

|[pi|C. |10 km/hr |

|c] | | |

|[pi|D. |5 km/hr |

|c] | | |

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8. It is 10:00 in the morning, and Wendy is late for school. She is currently running north at a speed of 5 meters per second and is 2 miles south of her school.

Which of the following best describes Wendy's current position?

|[pi|A. |running north |

|c] | | |

|[pi|B. |running at a speed of 5 meters per second |

|c] | | |

|[pi|C. |2 miles south of her school |

|c] | | |

|[pi|D. |10:00 in the morning |

|c] | | |

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9.

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image courtesy of wikimedia

Dan wants to lift his car using a movable pulley system like the one shown in the picture.

Using a movable pulley system will decrease the force needed to lift the car by increasing the

|[pi|A. |total mass of Dan's body. |

|c] | | |

|[pi|B. |total mass of the car. |

|c] | | |

|[pi|C. |distance over which the force is applied. |

|c] | | |

|[pi|D. |strength contained in Dan's arms. |

|c] | | |

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10. A ship was traveling across the Atlantic Ocean. It traveled 1,400 kilometers at a rate of 80 kilometers per hour. How long did it take the ship to travel this distance?

|[pi|A. |17.5 hr |

|c] | | |

|[pi|B. |112,000 hr |

|c] | | |

|[pi|C. |0.06 hr |

|c] | | |

|[pi|D. |15.56 hr |

|c] | | |

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11. Which of the screws below requires the least amount of effort force to turn?

|[pic] |[pic] |

|W. |X. |

|[pic] |[pic] |

|Y. |Z. |

|[pi|A. |W |

|c] | | |

|[pi|B. |X |

|c] | | |

|[pi|C. |Y |

|c] | | |

|[pi|D. |Z |

|c] | | |

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12. Starting from his house, Madoc rode his bike 300 m to the east, then 100 m to the north.

Which of the following vector diagrams shows Madoc's path? (Note: The height and width of each square in the grids is 100 m.)

|[pic] |[pic] |

|W. |X. |

|[pic] |[pic] |

|Y. |Z. |

|[pi|A. |Y |

|c] | | |

|[pi|B. |X |

|c] | | |

|[pi|C. |W |

|c] | | |

|[pi|D. |Z |

|c] | | |

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13. Megan is waiting for the school bus. She sees it driving down the street straight toward her position. If the bus is moving at a constant speed, which graph shows the position of the bus relative to Megan through time?

|[pic] |[pic] |

|W. |X. |

|[pic] |[pic] |

|Y. |Z. |

|[pi|A. |W |

|c] | | |

|[pi|B. |Z |

|c] | | |

|[pi|C. |X |

|c] | | |

|[pi|D. |Y |

|c] | | |

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14. A pitcher threw a fastball. The ball traveled 18 meters in 0.5 seconds. What was the speed of the ball?

|[pi|A. |36 miles/hour |

|c] | | |

|[pi|B. |9 seconds/meter |

|c] | | |

|[pi|C. |36 meters/second |

|c] | | |

|[pi|D. |9 hours/mile |

|c] | | |

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15.

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Cheryl has just climbed the steps of the metro bus. She begins walking 10 meters to the back of the bus at a constant speed of 3 miles per hour. At the same time, the bus begins moving forward at a constant speed of 3 miles per hour.

When Cheryl arrives at the back of the bus

|[pi|A. |she will not have moved relative to the Earth. |

|c] | | |

|[pi|B. |she will have moved 10 meters relative to the earth. |

|c] | | |

|[pi|C. |she will have moved 5 meters relative to the bus. |

|c] | | |

|[pi|D. |she will have moved 20 meters relative to the earth. |

|c] | | |

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16.

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When using a moveable pulley to lift an object, _______ of the object's weight is supported by the section of rope attached to the ceiling. This is why a moveable pulley requires _______ effort force than a fixed pulley to lift an object.

|[pi|A. |half, more |

|c] | | |

|[pi|B. |all, less |

|c] | | |

|[pi|C. |all, more |

|c] | | |

|[pi|D. |half, less |

|c] | | |

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17. A block and tackle pulley system, such as the one below, multiplies the effort force that is put into the system. By how much would the block and tackle system below mulitply the effort force?

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|[pi|A. |2 |

|c] | | |

|[pi|B. |16 |

|c] | | |

|[pi|C. |4 |

|c] | | |

|[pi|D. |8 |

|c] | | |

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18. The motion of an object can be described by its

|[pi|A. |speed. |

|c] | | |

|[pi|B. |position. |

|c] | | |

|[pi|C. |direction. |

|c] | | |

|[pi|D. |all of these |

|c] | | |

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The average speed of an object can be found by dividing the distance traveled by the time taken to travel it.

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19. Margarito's class is running sprints. Each student has to run to a wall 100 yards away, slap it, then run back to the starting line. It takes Margarito 58 seconds to run from the starting line to the wall and back again. What was Margarito's average speed?

|[pi|A. |1.7 yd/s |

|c] | | |

|[pi|B. |0.34 yd/s |

|c] | | |

|[pi|C. |3.4 yd/s |

|c] | | |

|[pi|D. |2.9 yd/s |

|c] | | |

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20. The image below shows a force of 10 N being applied to an object. The force is being applied toward the right, so the object is accelerating to the right. No other force is acting on the object.

Examine the image. Then, answer the question that follows.

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A second force of 7 N is applied to the object. If this second force is applied toward the left, which of the following will occur?

|[pi|A. |The object will begin moving toward the left, and it will move at a slower speed. |

|c] | | |

|[pi|B. |The object will continue moving toward the right, but its rate of acceleration will increase. |

|c] | | |

|[pi|C. |The object will begin moving toward the left, and it will move at a faster speed. |

|c] | | |

|[pi|D. |The object will continue moving toward the right, but its rate of acceleration will decrease. |

|c] | | |

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21. The average speed of an object is the _______ that an object moves divided by the _______ of the movement.

|[pi|A. |total area; total force |

|c] | | |

|[pi|B. |total distance; direction |

|c] | | |

|[pi|C. |total distance; total time |

|c] | | |

|[pi|D. |total time; total force |

|c] | | |

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22. When an unbalanced force acts on an object, the change in the object's _______ or _______ depends on the size and direction of the force.

|[pi|A. |mass; speed |

|c] | | |

|[pi|B. |position; mass |

|c] | | |

|[pi|C. |speed; direction |

|c] | | |

|[pi|D. |direction; mass |

|c] | | |

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23. Randy is sledding down a hill away from his sister, Leslie, who is standing at the top of the hill. At first, Randy moves at a constant speed down a nearly flat part of the hill. Then, suddenly, the hill becomes much steeper, and Randy almost immediately starts moving at a much faster speed.

Which graph shows Randy's position as he moves away from his sister?

|[pic] |[pic] |

|W. |X. |

|[pic] |[pic] |

|Y. |Z. |

|[pi|A. |W |

|c] | | |

|[pi|B. |Z |

|c] | | |

|[pi|C. |X |

|c] | | |

|[pi|D. |Y |

|c] | | |

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24. The graph below shows how the position of an object changes over time.

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Assuming that the motion of the object remains the same, where will the object be positioned when it has traveled for a total of 5 s?

|[pi|A. |1 m |

|c] | | |

|[pi|B. |4 m |

|c] | | |

|[pi|C. |6 m |

|c] | | |

|[pi|D. |5 m |

|c] | | |

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25. Jennie is driving her car on vacation. It is a 180 km drive from Jennie's house to her vacation spot. She takes 5 hours to get there.

What is Jennie's average speed?

|[pi|A. |175 km/hr |

|c] | | |

|[pi|B. |36 km/hr |

|c] | | |

|[pi|C. |52 km/hr |

|c] | | |

|[pi|D. |260 km/hr |

|c] | | |

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26.

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Using the graph, calculate the average speed of the object when it has traveled a distance of 90 meters.

|[pi|A. |30 m/s |

|c] | | |

|[pi|B. |270 m/s |

|c] | | |

|[pi|C. |30 s/m |

|c] | | |

|[pi|D. |3 m/s |

|c] | | |

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27. When in its hunting dive, the peregrine falcon is the fastest bird in the world. On a particular dive, a peregrine falcon covers 175 meters in 5 seconds. What was the average speed of the falcon?

|[pi|A. |875 m/s |

|c] | | |

|[pi|B. |5 m/s |

|c] | | |

|[pi|C. |180 m/s |

|c] | | |

|[pi|D. |35 m/s |

|c] | | |

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28. Which of the following units could be used for the average speed of an object?

|[pi|A. |miles per hour (mi/hr, mph) |

|c] | | |

|[pi|B. |meters per second (m/s) |

|c] | | |

|[pi|C. |kilometers per hour (km/hr) |

|c] | | |

|[pi|D. |all of these |

|c] | | |

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29. Janice is roller skating at a constant speed away from her house. The first half of the street is flat, but the second half has a steep upward hill. Janice moves more slowly as she skates up the hill.

Which graph shows Janice's position as she roller skates away from her house?

|[pic] |[pic] |

|W. |X. |

|[pic] |[pic] |

|Y. |Z. |

|[pi|A. |X |

|c] | | |

|[pi|B. |Z |

|c] | | |

|[pi|C. |Y |

|c] | | |

|[pi|D. |W |

|c] | | |

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30. Balanced forces will cause an object to move at a constant speed or to remain at rest. Which of the following graphs shows this situation?

|[pic] |[pic] |

|W. |X. |

|[pic] |[pic] |

|Y. |Z. |

|[pi|A. |Y |

|c] | | |

|[pi|B. |Z |

|c] | | |

|[pi|C. |X |

|c] | | |

|[pi|D. |W |

|c] | | |

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