Force and Motion - Jackie

D. 15 mph/s

11. If a car traveling 30 mph accelerated to 60 mph in 2 seconds, its rate of acceleration is

D. Newton's thirds law

12. The recoil (backward kick) of a gun is an example of

B. Be double

13. According to the Second Law of motion if the force that is the force that is producing the object's motion is doubled the acceleration will

D. Mass

14. Momentum is the force produced by velocity and what

D. Support Force

15. The force that holds you up as you sit in the chair is

A. Newton's First

16. A boy lying on the beach is best explained by which law

A. Newton's First

17. A wall in the front of the classroom is best explained by which law

A. Newton's First

18. A car that is moving down a highway at a constant velocity 60 mph is best explained by which law

B. Newton's Second

19. An airplane that is accelerating down a runway during take off is best explained by which law

D. Galileo

2. Which scientist first studied the movement of moving objects by experimentation?

C. Newton's Third

20. The reason your hands hurts if you strike the wall really hard is best explained by which law

C. 9.8 m/s 2

21. The pull of the Earth's gravity causes all objects to accelerate at

C. Newton's Third

22. Which law is best summed up by for every action there is an equal and opposite reaction

A. Newton's First

23. When a car comes to a quick stop what caused you to lurch forward?

B. Acceleration will decrease by half

24. If Igor puts twice as many rocks in his pick-up truck what will happen to his rate of acceleration if he uses the same amount of force?

C. Velocity

1. Little Susie went on a trip down the stairs at 9.8 m/s, which is the best facet of phyics being described?

D. A point of view

10. In order to detect motion you need

C. bowling ball

25. Which of the following objects will have the greatest momentum if all are moving at a velocity of 9.8 m/s downward?

A. Magnitude and direction

26. A force is a vector quantity because it has both

C. Zero

27. The force required to maintain an object at a constant velocity in outer is equal to

B. 5 N

28. An object is pulled northward with a force of 10 N and southward with a force of 15 N. The magnitude of the net force on the object is

C. 10 N

29. The force of friction on a sliding object is 10 N. The applied force needed to maintain a constant velocity is

C. Acceleration

3. Igor is in a dark closet running around in a circle. This may seem odd but how would a physicist explain Igor's actions?

C. 6 N

30. A 10-N falling object encounters 4 N of air resistance. The magnitude of the net force on the object is

B. 0 N

31. A 10-N falling object encounters 10 N of air resistance. The net force on the object is

B. 0 N

32. An apple weighs 1 N. When held at rest above your head, the net force on the apple is

B. 1 N

33. An apple weighs 1 N. The magnitude of the net force on the apple when it is in free-fall is about

A. Moving at a constant velocity B. In mechanical equilibrium C. at rest D. All of these have no change in their state of motion ✓✓✓✓✓✓ E. None of these

34. Which has no change in its state of motion? An object

A. is the same for both

35. a car traveling at 100 km/h strikes an unfortunate bug and splatters on it. The force of impact is greater on who, according to Newton's 3rd

D. 28 km from Las Angeles to Catalina Island

36. Which of the following does not indicate velocity?

A. Convert the mass to kilograms B. Convert the distance to meters C. Covert the hours to time D. All of the above E. Only A and B above ✓✓✓✓✓✓

37. If you are given the mass of an object in pounds, the time in seconds, and the distance in feet, what must you do before you can calculate the momentum in SI units?

A. -21.25 m/s

38. An f 18 fighter jet landing on an aircraft carrier's flight deck that has a length of 300.0m must reduce its speed form about 153km/h to 0.0km/h in 2.0 s. What is the jet acceleration?

C. Inertia

39. The tendency of objects to resist changes in motion

B. Friction

4. In Galileo's study of motion, what force did he have to negate (ignore)?

D. Air Drag

40. The frictional force of the atmosphere on a falling object

B. 0.1 m/s2

41. A runner whose initial speed is 29 km/h increases her speed to 31 km/h in order to win a race. If the runner takes 5.0 s to complete this increase in her speed, what is her acceleration?

A. Is zero

42. Whenever the net force on an object is zero, its motional change

C. A will have more inertia

43. A and B are tow objects with masses 100 kg and 75 kg respectively, then ____________

B. Equal to zero

44. The resultant of balanced forces is __________________

B. The boat would move to the south at a lower speed

45. A boat is sailing to the south at a speed of 10 mph. A water current which is acting on the boat is moving to the north at a speed of 1 mph. Which statement describes the effect the current will have on the position and motion of the boat if all other conditions are the same?

B. Remain at rest

46. If the net force acting on a stationary object is zero, then the object will

C. Unbalanced Forces

47. A tug-of-war that results in one team pulling the other across the line is an example of

C. The car's average speed between the two points

48. The diagram below shows information about the motion of a toy car between two points on a track. Which of the following can be determined using the information shown in the diagram? Start Finish car--------------------------->car time = 0 s time = 6 s distance = 0 s distance = 3 s

C. The object is experiencing some kind of friction.

49. A force is continuously applied to an object, causing it to accelerate. After a period of time, however, the object stops accelerating. What conclusions can be drawn?

C. Igor

5. Little Susie is in her car and is passing Igor as he lies next to the road. What is Susie's point of reference if she is in motion?

D. Accelerated Motion

50. The data tables below show the times and distances traveled by two ice skaters. Skater Z demonstrated what type of motion? Skater X Time Distance Traveled (seconds) (meters) 10 10 20 20 30 30 40 40 50 50 60 60 Skater Z Time Distance Traveled (seconds) (meters) 10 10 20 25 30 50 40 85 50 125 60 200

B. Are in a vacuum

6. All objects will fall at the same rate if they

C. Inertia

7. Any object at rest possesses

A. 0.4km /h North

8. A cowboy rode his horse around his entire property and then ended at home as shown in the figure below. It took him 5 hours to complete his job from start to finish. What was the cowboy's average velocity when you consider his displacement? end ! ! 2.0km ! !__HORSE____________4.0 km____________________ !start ! ! ! 2.0 km ! ! ! 2.5 km _2.0 km__! ! ! ! ! !_____________3.0 km_________________!0.5 km

A. Uniformly Accelerating

9. If a speed shows an increase of 5mph every 5 seconds for 5 seconds the automobile would be