Middle school science

Total Flash Cards » 53
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1. equal forces acting in opposite directions balanced forces
2. occurs when an object's velocity decreases negative acceleration
3. sum of all forces acting on an object net force
4. total distance divided by total time average speed
5. name for the slant of a line on a graph slope
6. distance divided by time speed
7. a push or pull exerted on a body or object force
8. distance and direction of an object from its starting point displacement
9. tendency to resist change in motion Inertia
10. measure of how far and object has moved distance
11. speed and direction of motion velocity
12. rate of change of position at a specific point in time Instantaneous speed
13. the rate of change in velocity acceleration
14. compare and contrast: distance and displacement both are links; displacement is direction and distance; distance is how far you have moved
15. compare and contrast: speed and velocity both meters per second: speed is distance and velocity is speed and direction
16. explain the difference between positive and negative acceleration positive is speeding up negative is slowing down
17. how are force and motion related?­- both take unbalanced force to cause motion
18. what property of matter is inertia related to? mass
19. a car travels west for 240 kilometers in 4 hours. What is the car's velocity? 60 kilometers per hour west
20. an object goes from a speed of 9 m/s to a total stop in 3 sec.what is the object's velocity? -3
21. explain what causes an unrestrained passenger in a car to fly forward when the car stops suddenly inertia
22. the amount of matter in an object mass
23. the net force acting on an object is zero blanced forces
24. the speed of an object and the direction of its motion velocity
25. the sum of all the forces acting on an object net force
26. rate of change of the velocity of an object acceleration
27. a measure of how far an object has moved distance
28. the rate of change in position at a given point in time instantaneous speed
29. the distance and direction an object moves from its starting point displacement
30. the total distance an object travels divided by the time of travel average speed
31. the rate of change of an object's position speed
32. unequal forces pushing in opposite direction unbalanced forces
33. any change over time rate
34. an object that is neither speeding up or slowing down travels at a________. constant speed
35. a graph with distance on a vertical axis and time on a horizontal axis distance-time graph
36. when an object is accelerating, its speed is_______. changing
37. state newton's first law an object at rest will remain at rest until an unbalanced force acts on it
38. if the net force acting on a body is zero, will the velocity be zero? no the velocity is constant, the object will not change its motion
39. will all forces cause an object to accelerate? no only an unbalenced force
40. another name for newton's first law of motion inertia
41. an object slowing down has a_______ acceleration negative
42. the velocity of an object must have both a______ and a _________ speed; direction
43. the equation s=d/t is used to calculate the_____ of an object speed
44. in terms of positive, negative, and zero exceleration, how would you describe the motion of a student moving in a cafeteria lunch line stand still- zero forward- positive backwards- negative
45. explain why the second hands of a clock cannot travels at constant velocities they are changing direction
46. can the velocity of a car change when it's acceleration is constant? explain why or why not yes the direction is always changing
47. a car approaching a red traffic light has a_________ acceleration; when the light turns green, the car's acceleration is ____ negative; positive
48. in the equation s=d/t, d stands for______ distance
49. in the equation used to calculate acceleration, Vi stands for _______ and Vf stands for______ initial;final
50. if the acceleration of a skateboarder is ___, the sakteboarder may be soon coming to a stop negative
51. a net __ is necessary for an object to chanege its motion unbalanced
52. a freight train has more__ than a care, so it has great inertia mass
53. if two people push on an object beween them with equal force but in opposing directions, the net force is __? zero