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Forces of Motion

Forces of Motion . Test. 1. Motion is…. when an object stays still and does not move. when an object changes position over time. when an object changes position but time is not a factor. 2. What is speed?. The rate of change in position. The rate of change in time.

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Forces of Motion

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  1. Forces of Motion Test

  2. 1. Motion is… • when an object stays still and does not move. • when an object changes position over time. • when an object changes position but time is not a factor.

  3. 2. What is speed? • The rate of change in position. • The rate of change in time. • The rate of change in distance.

  4. 3. What are the two factors used to calculate average speed? • force and mass • total distance and time • time and mass of an object • speed and direction an object traveled

  5. 4. Jon ran 20m in 10 seconds. What is his average speed? • 2m/s • 30m/s • 10m/s

  6. 5. Force is the… • push or pull of an object • push only of an object • pull only of an object

  7. 6. Force is measured in • meters • seconds • Newtons

  8. 7. As the distance between two objects increases, the force of gravity between them • decreases • does not change • increases only slightly

  9. 8. The gravitational pull is greater between two objects that • have greater masses. • have rougher surfaces • are farther apart.

  10. 9. Which of the following is an example of a balanced force? • A baby pushed in a stroller on the sidewalk. • A child running down a path. • A porch swing hanging still from the porch roof.

  11. 10. If a baseball and a cannonball are dropped from a height of 15m, which ball will hit the ground first? • The cannonball because it is heavier. • The baseball because it is lighter. • Both will hit the same time because gravity pulls all objects to Earth at the same rate.

  12. 11. According to Newton’s first law of motion, an object in motion will… • stay in motion until acted upon by an outside force. • stop when the energy runs out. • stay in motion but zigzag in different directions.

  13. 12. Which cart will accelerate the least? • an empty cart pushed with a hard force. • a full cart pushed with a hard force. • an empty cart pushed with a light force.

  14. 13. Why does a crumpled piece of paper land before a flat sheet of paper? • Gravity exerts more force on the crumpled paper. • There is more air resistance on the flat paper. • The crumpled paper is heavier.

  15. 14. For every action there is an equal and opposite reaction is Newton’s_____law. • Newton’s First Law • Newton’s Second Law • Newton’s Third Law

  16. 15. The amount of acceleration is affected by what two factors? • size of the force and mass of the object. • the lightness of force and height the object drops. • air resistance and the mass of object.

  17. 16. Newton’s_______law states a net force acting on an object causes the object to accelerate in the direction of the force. • first • second • third

  18. 17. The Family truckster, a minivan, broke in the middle of the road. Little Junior tried to push the van but it didn’t budge until big daddy applied more force and pushed the van out of the way. • Newton’s 1st Law • Newton’s 2nd Law • Newton’s 3rd Law

  19. 18. The hockey player pressed his skates hard against the ice enabling him to stop skating. • Newton’s 1st Law • Newton’s 2nd Law • Newton’s 3rd Law

  20. 19. Rob’s slap shot goes faster than his wrist shot while shooting on goal during a hockey game. • Newton’s 1st Law • Newton’s 2nd Law • Newton’s 3rd Law

  21. 20. When you paddle a canoe, the canoe goes forward. • Newton’s 1st Law • Newton’s 2nd Law • Newton’s 3rd Law

  22. 21. While conducting the egg drop experiment, Liam used light weight bubble wrap that had a wide surface area which produced enough air resistance to allow the egg to slowly and gently drift down to the floor. • Newton’s 1st Law • Newton’s 2nd Law • Newton’s 3rd Law

  23. 22. Which diagram would have the greatest amount of gravitational force? a. b.

  24. 23. Which force would have the greatest affect on a person parachuting from a plane? a. wind resistance b. air resistance c. another object d. friction

  25. 24. Which object would hit the ground first if dropped from a 10m ladder, a 10kg watermelon or a 10kg piece of poster board? a. 10 kg watermelon b. 10kg poster board c. both would hit at the same time

  26. 25. Which surface would provide the most friction for a skateboarder, a gravel road or a blacktop road? a. gravel road b. blacktop road

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