Download crct/final exam review forces and motion #1

CRCT/FINAL EXAM REVIEW FORCES AND MOTION #1
1. Define motion.
2. Define reference point.
3. What determines if motion has occurred?
4. What are the basic units used on motion?
5. Define displacement.
6. Define speed.
7. Speed is an example of a rate. What is a rate?
8. State the formula to find speed.
9. What do I mean when I say that an object has constant speed?
10. What 2 components determine an object’s velocity?
11. When graphing an object’s motion on a line graph, you plot distance on the y-axis and
time on the x-axis. What does the slope of the line tell you?
12. Create a graph showing an object with constant speed.
13. Create a graph showing an object that is slowly gaining speed.
14. Create a graph showing an object with a fast steady speed.
15. Create a graph showing an object that traveled for 5 km then became stationary.
16. Create a graph showing an object that traveled for 5 km, then stopped for one minute, and
then returned to its starting position.
17. Define acceleration.
18. What is the difference between positive acceleration and negative acceleration?
19. Can you experience acceleration while traveling at a constant speed? Explain.
20. State the formula to calculate acceleration.
21. What are the units on acceleration?
Give examples.
22. What has to happen for constant acceleration to occur?
23. Line graphs can be used to show acceleration. Speed is plotted on the y-axis and time is
plotted on the x-axis. What tells you the acceleration of the object?
24. Create a graph showing an object with constant acceleration.
25. Create a graph showing an object with constant deceleration.
26. Create a graph showing an object with rapid positive acceleration.
27. Which of the following is an example of acceleration?
a. a train traveling south at 50 km/hr
b. a car traveling north at 30 km/hr
c. a person running at 3 meters per second on a winding path
d. a truck stopped at a red light
Why?
28. What is the average speed of an object that travels 28 meters in 7 seconds?
29. What is the average acceleration of a car that goes from a complete stop to 60 km/hr in 5
seconds?
30. Define force.
31. What units are on force?
32. Define net force.
33. Define balanced force.
34. Define unbalanced force.
35. What determines the direction an object moves?
36. Only an __________________ force can change the motion of an object.
37. If forces are acting in opposite directions, how do you determine net force?
38. If forces are acting in the same direction, how do you determine net force?
39. What is the net force acting on the objects below?
16 N
6N
30 N
8N
4N
12 N
40. What is the net force acting on the object below?
10 N
18 N
41. Define inertia.
42. What is the relationship between mass and inertia?
30 N
43. Two forces that can affect an object’s motion are friction and gravity.
friction affect an object’s motion?
How does
How does gravity affect an object’s motion?
43. What factors determine the amount of friction that is generated?
44. What is the relationship between mass, weight, friction, and gravity?
45. State 2 ways to reduce friction.
46. What determines how strongly gravity pulls on an object?
47. All objects with mass exert a gravitational pull. Why does Earth pull you toward its
center rather than you pulling Earth toward your center?
48. State Newton’s Law of Universal Gravitation.
49. Why does your weight change every time you visit a new planet?
50. What is the force with which gravity pulls on objects that are close to Earth?
51. An object that is falling toward Earth, what is its acceleration when only gravity is acting
on it?
52. Define free fall.
53. Define terminal velocity.
54. Gravity is a weak / strong force.
55. Which pair of objects will have the least gravitational attraction?
a. 2 concrete blocks 6 cm apart
b. 2 marbles 12 cm apart
c. a concrete block and a marble 6 cm apart
d. a concrete block and a marble 12 cm apart