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70 Cards in this Set
- Front
- Back
1. The motion of an object looks different to observers in different______________________.
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2. The SI unit for measuring ______________is the meter.
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3. The direction and length of a straight line from the starting point to the ending point of an object’s motion is __________________________.
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4. Displacement and velocity are examples of ____________ Because they have both magnitude and direction.
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5. The sum of two or more vectors is called the ___________.
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6. Speed is measured in units of ______________________.
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7. A car’s speedometer measures _____________________.
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8. V = D divided by T is the equation that defines ________________.
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9. A constant slope on a distance- time graph indicates _________________ speed.
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10. The difference between speed and velocity is the velocity indicates the ________________ of motion and speed does not.
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11. A distance-time graph indicates an object moves 20 km in 4 h. The average speed of the object is ___________km/h.
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12. Because its ___________ is always changing, an object moving in a circular path experiences a continuous change in velocity.
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13. Two or more velocities add by _____________________.
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14. A moving object does not ____________ if it velocity remains constant.
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15. Freely falling objects accelerate at 9.8 m/s squared because the force of ____________ acts on them.
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16. The velocity of an object moving in a straight line changes at a constant rate when the object is experiencing constant ____________________.
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17. The acceleration of a moving object is calculated by dividing the change in _____________by the time over which the change occurs.
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18. Acceleration motion is represented by a (an) ___________ line on distance-time graph.
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19. A car that increases it speed from 20 km/h to 100 km/h undergoes ____________ acceleration.
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20. ________________is how fast a velocity is changing at specific instant.
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21. A push or pull is an example of a (an) _______________.
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22. The type of force measured by a grocery store spring scale is ______________________.
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23. The sum of all the forces acting on an object is called the _________________________.
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24. If the forces acting on an object produce a net force of zero, the forces are called _______________________.
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25. The force that opposes the motion of object that touch as they move past each other is called _______________.
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26. It usually takes more force to start an object sliding than it does to keep an object sliding because static friction is usually____________________ than sliding friction.
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27. The two forces acting on a falling object are gravity and ________________________.
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28. When a falling object reaches terminal velocity, the net force acting on it is ________________________.
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29. The drag force acting on a falling sky diver is also known as ______________________________.
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30. The path of motion of a thrown javelin is an example of ________________________motion.
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31. The tendency of an object to resist any change in it motion is called _______________________.
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32. During a head-on auto collision, ____________ causes a passenger in the front seat to continue moving _________.
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33. The acceleration of an object is equal to the net _________ acting on the object divided by the object’s ___________.
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34. The force of gravity acting on an object is the object’s ___________________.
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35. If a golf ball and bowing ball are rolling at the same speed, the ______________________ ball has greater momentum.
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36. When you push on a wall, the ______________pushes back on you.
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37. In a closed system, the loss of momentum of one object ____________ the gain in momentum of another object.
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38. The observation that a charged object can attract or repel other charged objects led scientists to conclude that there are _________________ types of charges.
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39. The universal force that is effective over the longest distance is ____________________.
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40. The centripetal force acting on the moon continuously changes the ________________of the moon’s motion.
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41. Pressure is the result of force distributed over a (an) __________________.
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42. The formula force divided by area is used to calculate _____________.
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43. The SI unit of pressure is the ______________________.
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44. A pascal, the SI unit of pressure, is equal of 1 newton per ____________________________.
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45. A substance that flows and assumes the shape of its container is a (an) __________________________.
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46. As a liquid is added to a beaker, the pressure exerted by the liquid on the bottom of the beaker ______________.
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47. The pressure exerted by a fluid at any given depth is exerted _______________________ in all directions.
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48. As your altitude increased, air pressure _______________.
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49. A hydraulic jack is an application of _________ principle.
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50. A device that uses pressurized fluids acting on pistons of different sizes to change a force is called a (an) _________.
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51. As the speed of a fluid increased, the __________ within the fluid decreases.
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52. In a hydraulic lift system, the fluid pressure exerted throughout the system is _____________________.
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53. The downward force produced when air flows over the wing like spoiler on a race car is an example of ______________________________ principle.
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54. The apparent loss of weight of an object in a fluid is called _____________________________.
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55. The direction of the buoyant force on an object placed in a fluid is ___________________________.
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56. Even a rock at the bottom of a lake has a (an) __________ Force acting upward on it.
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57. The unit f/cm3 is often used to express _______________.
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58. As you climb a high mountain, the buoyant force exerted on you by the atmosphere ______________________.
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59. A submerged submarine alters its _________________ To rise or fall in the water.
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60. The weight of an object that sinks in a fluid is _______ _________________ than the buoyant force acting on it.
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61. For work to be done on the object, the object has to ___________________________.
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62. Any part of a force that does not act in the direction of an object’s motion does not ________________ on an object.
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63. The SI unit of work is the _________________________.
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64. You calculate work by multiplying the force acting in the direction of ______________by the distance the object moves.
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65. The rate at which work is done is called ______________.
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66. The SI unit of power is the ______________________.
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67. The watt and the horsepower are both units of ___________________________________.
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68. A machine is a device that changes a (an) _____________.
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69. A device that changes the size or direction of force used to do work is called a (an) ___________________________.
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70. The force that is exerted on a machine is called the _________________________ force.
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