Motion Unit Study Guide
Physical Science
Name: ___________________________________
Due Date: _____________
____________________ 1. An object’s change in position relative to a reference point
____________________ 2.
The stationary object used to determine if an object is in motion
_____________________ 3. The most common reference point
_____________________ 4. The measurement of the path taken by an object
_____________________ 5. The measurement of an object’s change in direction
_____________________ 6. It describes how fast an object moves
_____________________ 7. When an object covers equal distances in equal amounts of time
_____________________ 8.
A measurement that doesn’t have to be in a straight line or in a specific direction
_____________________ 9. Unit of measurement for speed
_____________________10. A measurement that must be in a straight line and must have a specific direction
_____________________11. In a distance-time graph, time is this variable
_____________________12. In a distance-time graph, distance is this variable
_____________________13. This gives the speed of an object in a distance-time graph
_____________________14. This describes the motion of an object moving at changing speeds
_____________________15. An object at rest has a slope of ____.
_____________________16. This describes the speed of an object at any given point in time
_____________________17. Formula for speed in words
_____________________18. Formula for velocity in words
_____________________19. This describes both the speed and the direction of motion of an object
_____________________20. The rate at which velocity changes
_____________________21. Formula for acceleration in words
_____________________22. Unit measurement for acceleration
_____________________23. Unit measurement for velocity
_____________________24. Uniform circular motion in which velocity in always changing
_____________________25. Is also uniform circular motion
Motion Unit Study Guide
Physical Science
Name: ___________________________________
Due Date: _____________
_____________________26. Three measurements that are vector quantities
_____________________
_____________________
_____________________27. If the acceleration is small, the velocity is INCREASING/DECREASING
gradually
_____________________28. Positive acceleration equals
_____________________29. Negative acceleration equals
_____________________30. Is an action exerted on an object in order to change the object’s state of rest or
motion
_____________________31. Force has these two things
_____________________
_____________________32. Force can exist in two ways
_____________________
_____________________33. Occur when the forces applied to an object produce a net force of zero
_____________________34. Occur when forces applied to an object produce a net force greater than zero
_____________________35. Is the force that opposes motion between two surfaces that are in contact
_____________________36. Two types of friction
_____________________
_____________________37. Type of force that does not cause an object to move
_____________________38. Type of force that does cause an object to move
_____________________39. Friction opposes this on an object
_____________________40. An object not in motion indicates this type of forces
_____________________41. An object accelerating indicates this type of forces
_____________________42. Is the force of friction against an object already in motion
_____________________43. Is the force of friction opposing the initial movement of an object from rest to
motion
Motion Unit Study Guide
Physical Science
Name: ___________________________________
Due Date: _____________
_____________________44. The three types of kinetic friction
_____________________
_____________________
_____________________45. Which is greater, static or kinetic friction?
_____________________46. Friction that occurs between objects that are sliding past each other
_____________________47. The friction of a round object rolling over a flat surface
_____________________48. The friction of a moving object traveling through a fluid
_____________________49. Substances that help to reduce harmful friction
_____________________50. The three ways of reducing harmful friction
_____________________
_____________________
_____________________51. Two ways of increasing helpful friction
_____________________
_____________________52. The force of friction when air is the fluid
_____________________53. An object traveling at a constant speed has this type of forces
Problems:
Using the 5-point system of problem solving, solve each problem and circle your answers.
54. Bob straps on his in-line skates and pushes down a hill. His velocity changes from 0 m/s to 4.5 m/s exactly
15 s later. What is Bob’s average acceleration? (5 points)
Motion Unit Study Guide
Name: ___________________________________
Physical Science
Due Date: _____________
55. A baseball is hit straight up at an initial velocity of 30 m/s. If the ball has a negative acceleration of about
10 m/s2, how long does the ball take to reach the top of its path (5 points)
56. Heather and Matthew take 45 s to walk eastward along a straight road to a store 72 m away. What is their
average velocity? (5 points)
57. Simpson drives his car with an average velocity of 85 km/h eastward. How long will it take him to drive
560 km on a perfectly straight highway? (5 points)
Motion Unit Study Guide
Name: ___________________________________
Physical Science
Due Date: _____________
58. A driver is traveling eastward on a dirt road when she spots a pothole ahead. She slows her car from 14.0
m/s to 5.5 m/s in 6.0 s. What is the car’s acceleration? (5 points)
59. Use the diagram to determine the resulting displacement and the distance traveled by the skier during these
three minutes. (5 points)
60. What is the displacement of the cross-country team if they begin at the school, run 10 miles and finish back
at the school? Explain your answer. (2 points)