The distance vs



Name: ____________________

Physics: Force and Motion- Review Sheet

The distance vs. time graph below shows data collected as a remote-controlled car moved across a level parking lot.

[pic]

1. According to the graph, which of the following conclusions about the car's motion is supported?

|  |A. |The car is accelerating. |

|  |B. |The car is stopping and starting. |

|  |C. |The car is traveling at a constant velocity. |

|  |D. |The car is moving through an obstacle course. |

2. Some students measure the acceleration of a wheeled cart being acted on by varying forces. The students record their data in the table shown above. According to the data table, how much force is acting on the cart when the students measure an acceleration of 4.8 m/s2?

|Force Acting on Cart (N) |Cart Acceleration (m/s2) |

| |0.4 |

|1 | |

| | |

|2 |0.8 |

| | |

|7 |2.8 |

| | |

|9 |3.6 |

| | |

|? |4.8 |

3. The forces acting on a skateboarder moving at a constant velocity along a sidewalk are shown in the figure below.

|Normal force = 600 N |

|Weight of skateboarder = 600 N |

| |

|[pic] |

Which of the following is the net force on the skateboarder?

|  |A. |0 N |

|  |B. |70 N |

|  |C. |670 N |

|  |D. |1270 N |

4. A sailboat travels 35 km in 5 hr. Which of the following describes the motion of the sailboat?

|  |A. |Its momentum is 7 km/hr. |

|  |B. |Its acceleration is 7 km/hr. |

|  |C. |Its displacement is 7 km/hr. |

|  |D. |Its average speed is 7 km/hr. |

Explain how a distance vs. Time graph shows a constant speed. ____________________________________________________________________________________________________________________________________________________________________________________

Explain how a distance vs. time graph shows acceleration. ____________________________________________________________________________________________________________________________________________________________________________________

Explain how a speed vs. time graph shows constant speed . ____________________________________________________________________________________________________________________________________________________________________________________

The graphs below show movement over time.

[pic]

5. A truck and car are on separate journeys on the same straight road. The truck is traveling at a constant velocity. The car changes speed and direction.

a. Which of the graphs best represents the truck’s journey? Explain your answer._____________________________________________________________________________________________________________________________________________________________________________________________

b. Which of the graphs best represents the car’s journey? Explain your answer. __________________________________________________________________________________________________________________________________

6. The chart below shows the position of a car moving in a straight line.

|Position of a Car |

|Time (s) |Position (m) |

|0 |75 |

|10 |125 |

|20 |175 |

|30 |225 |

|40 |275 |

a. Use the data in the chart to draw and correctly label a position versus time graph.

b. Based on the data in the chart, what is the average speed of the car in m/s from 0 s to 40 s?

c. Based on the graph that you have drawn, describe the acceleration of the car.

7. Two forces act on the 2 kg box shown below.

[pic]

A 4 N force acts to the right and a 6 N force acts to the left. What is the net force acting on the box?

|  |A. |10 N to the right |

|  |B. |10 N to the left |

|  |C. |2 N to the right |

|  |D. |2 N to the left |

8. The graph below relates speed and time of four cars (1, 2, 3, and 4) traveling along a straight highway.

Which two cars move with zero acceleration?

|  |A. | 1 and 4 |

|  |B. | 2 and 3 |

|  |C. | 1 and 2 |

|  |D. | 3 and 4 |

9. Make sure you are comfortable with all vocabulary

7. The graph shows the motion of a model train. What was the average speed of the train in meters/second at point D? Round your answer to the nearest tenth, writing and bubbling your answer on the grid above.

10. A lion travels 15 miles in 30 hours. What is the lion’s average speed?

11. If arrows are used to express force, describe the difference between the forces below.

a.

b.

12. What do balanced forces do?

____________________________________________________________________________________________________________________________________________________________________________________

13. What do unbalanced forces do?

______________________________________________________________________________________________________________________________________________________________________________

Rules for calculating the net force of an object

14. If the arrows are moving in the same direction, then you must _______________ the forces.

15. If the arrows are moving in opposite directions, then you must _______________ the forces.

16. If the net force is equal to zero, then the forces are _________________________.

17. If the net force is not equal to zero, then the forces are _____________________________.

18. State Newton’s Three Laws of Motion

First Law – Law of Inertia ____________________________________________________________________________________________________________________________________________________________________________________

Second Law – Law of Acceleration

____________________________________________________________________________________________________________________________________________________________________________________

Third Law – Law of Action/Reaction

____________________________________________________________________________________________________________________________________________________________________________________

19. Give 3 real world examples of each Law

1st

1. ____________________________________________________________________________________

2. ____________________________________________________________________________________

3. ____________________________________________________________________________________

2nd

1. ________________________________________________________________________________

2. ____________________________________________________________________________________

3. ____________________________________________________________________________________

3rd

1. ____________________________________________________________________________________

2. ____________________________________________________________________________________

3. ____________________________________________________________________________________

What is Inertia? ____________________________________________________________________________

Draw an F=MA triangle. What is the acceleration of a bicycle that has a mass of 12 kg and has an applied force of 35N? __________

20. The three vehicles are moving at 50 mi/hr. The Minivan and sedan are not accelerating because? ____________________________________________________________________________________________________________________________________________________________________________________

21. A student runs 6 km in 30 min. What is the students average speed in km/hour?

______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

22. The diagram below shows a boat moving north in a river at 3 m/s while the current in the river moves south at 1 m/s.

How will the boat be affected if it enters a part of the river where the current is moving south at 6 m/s?

_____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

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Minivan

Sedan

Pickup Truck

Current 1 m/s

Boat 3 m/s

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