1 / 83

Final Exam Review

Final Exam Review . Speed, Velocity, & Acceleration. In order to determine speed, you must know. Time Distance Both 1 and 2 None of the above. The difference between speed and velocity is that velocity includes. Direction Distance Time weight.

jada
Télécharger la présentation

Final Exam Review

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Final Exam Review

  2. Speed, Velocity, & Acceleration

  3. In order to determine speed, you must know • Time • Distance • Both 1 and 2 • None of the above

  4. The difference between speed and velocity is that velocity includes • Direction • Distance • Time • weight

  5. Which of the following does not indicate velocity? • 25 m/s NNE • 49 km/h toward downtown • 99 km/h going from Syracuse to Toronto • 44 km from Los Angeles to San Francisco

  6. A car approaches a cliff 101 km away. The car reaches the cliff in 1.5 hours. What is the speed of the car? • 18 m/s • 18 km/hr • 67 m/s • 67 km/hr • 0.019 km/s • 0.019 m/s

  7. The world’s fastest passenger elevator operates at an average speed of 15 m/s. If the 60th floor is 245 meters above the first floor, how long does it take the elevator to go from the first floor to the 60th floor? • 16 s • 0.061 s • 3600 s • 16.3 s

  8. How would you describe the motion shown in the distance – time graph below? • This object is accelerating every 15 minutes • This object is changing velocity every 15 minutes • This object is moving at a constant speed

  9. Does travel at a constant speed mean you are not accelerating? • NO!!! • Remember that you can change velocity by changing direction, thus CHANGING ACCELERATION!

  10. When a ferris wheel goes up and around, what about its passengers is changing? • Speed • Velocity • Acceleration • None of the above

  11. Which of the following lines shows constant acceleration • A • B • D

  12. Acceleration • Acceleration – the rate at which velocity changes • So if the slope of a velocity time graph is straight, acceleration is constant

  13. Calculating Acceleration Acceleration = (Vf-Vi) t Let’s look at the picture below…what is this car’s avg acceleration? 1 s 2 s 3 s 4 s 0 s 4 m/s 12 m/s 16 m/s 0 m/s 8 m/s

  14. Graphing Acceleration:Speed vs. Time Graphs • If speed is changing with time = accelerating • If the line is straight = acceleration is constant • So what is happening below?

  15. Graphing Acceleration:Speed vs. Time Graphs Rise = 4 m/s Run = 2 s • In Speed vs. Time graphs: • Acceleration = Rise/Run • = 4 m/s ÷ 2 s = 2 m/s2

  16. Balanced vs. Unbalanced Forces and Friction Types

  17. Which one of the following does not result in a net force of zero? • Balanced Forces • Unbalanced forces • Constant Speed • A stationary object

  18. A book is sitting still on your desk. Which of the following best describes the situation? • There are no forces acting on the book. • The book is moving compared to the reference frame. • There are balanced forces acting on the book. • There are unbalanced forces acting on the book.

  19. _________ is a force that opposes the motion between two objects in contact with each other. • Motion • Friction • Acceleration • Velocity

  20. 4. What type(s) of friction would be present when you are skating on your skateboard down the sidewalk? • Rolling • Static • Fluid • Both 2 & 3 • Both 1 & 3

  21. Any change in an object’s speed is caused by: • The object’s mass. • The object’s direction. • A balanced force. • An unbalanced force.

  22. How would you describe the friction that exists between a car windshield and the air as you drive into the wind? • Static • Kinetic • Fluid • All 3 • Both 1 and 2 • Both 2 and 3

  23. Which type of friction has the strongest force? • Static force is the greatest because it is strong enough the keep an object from moving

  24. Newtons’ Laws

  25. Newton’s 1st law of motion applies to: • Only objects that are moving. • Only objects that are not moving. • All objects, whether moving or not. • No object, whether moving or not.

  26. Automobile seat belts are necessary because of a passenger’s: • Weight • Inertia • Speed • Gravity

  27. The Newton is a measure of: • Mass • Length • Force • Acceleration

  28. 5. A driver is headed north at 50 km/hr. A box is sitting on the seat next to him. What action by the driver will cause the box to move towards him/her? • applying the brakes • speeding up to 60km/hr • making a turn to the right • making a turn to the left

  29. An object has a mass of 5 kg & an acceleration of 4 m/s2. What is the force on the object? • 9 N • 1 N • 0.8 N • 20 N

  30. A teacher dropped one light ball & one heavy ball simultaneously from the roof of a school. Ignoring air resistance, both balls struck the ground at the same time because: • they lose mass as they fall • they are influenced by the height of the building • they don’t accelerate under the influence of gravitational force. • they accelerate at the same rate, regardless of mass, due to the force of gravity.

  31. The picture below shows the four major forces acting on an airplane in flight. What causes the force indicated by the X? • gravity • air friction • magnetic force • force exerted by the engine

  32. 7. An object with a force of 15.99 N on it is accelerating at 21m/s2. What is the mass of the object? • 335kg • 0.761g • 76.1g • 0.76kg

  33. Which statement accurately describes the interaction between the foot and sidewalk as the person moves forward along the sidewalk in the direction of the arrow? • The foot pushes forward on the sidewalk; the sidewalk does not push forward on the foot. • The foot pushes forward on the sidewalk; the sidewalk pushes forward on the foot.  • The foot pushes backward on the sidewalk; the sidewalk pushes forward on the foot.  • The foot pushes backward on the sidewalk; the sidewalk pushes backward on the foot.

  34. A baseball player catches a line-drive hit. If the reaction force is the force of the player’s glove stopping the ball, the action force is… • The force of the player’s hand on the glove • The force applied by the player’s arm • The force of the player’s shoes on the dirt • The force of the ball pushing on the glove

  35. When is the Kinetic energy the greatest? • A • B • C A C h B Reference level (h = 0)

  36. Potential and Kinetic Energy

  37. 13 of 25 If the height of the ramp is 2m and the mass of the ball is 4 kg, what is the PE of the ball before it rolls? • 20 J • 80 J • 8 J • 0.8 J

  38. 1 of 25 If a ball had 0.20 J of PE at the top of the ramp (before it rolls), what is the maximum amount of KE the ball could have? • .40 J • .10 J • .20 J • 100J

  39. 7 of 25 A dog can run briefly with a speed of 5.00 m/s. Suppose a dog with a mass of 3.00 kg runs at this speed. What is the dog’s kinetic energy? • 15.0 J • 150. J • 75.0 J • 37.5 J

  40. Assuming there is no air resistance or friction, the total energy of the box is • always the same. • negative at point D. • increasing with time. • zero before the box is released.

  41. Energy Transfer

  42. 1. The primary reason an ice cube melts when placed in your hand is • conduction causes coldness to leave the ice. • radiation from the hand enters the ice. • conduction causes heat to leave the hand. • convection currents leave the hand.

  43. 2. Which is the best explanation for the small puddle around Cup A & the larger puddle around Cup B? • Cup A had more ice. • Cup A was a better insulator than Cup B. • Cup A had a greater volume of lemonade. • The contents of Cup A were initially colder than the contents of Cup B.

  44. 3. Convection currents rise in air because • hot air rises and cold air remains stagnant (still). • cool air falls and hot air rises. • the molecules in hot air move slower. • hot air has less friction.

  45. 5. Jackie used a drill to remove screws from a table. She noticed that the screws holding the table together were warm to the touch. What explains this? A. Mechanical energy was converted into thermal energy due to friction. B. Electrical energy was converted into chemical energy due to resistance. C. Thermal energy was converted into mechanical energy due to inertia. D. The process concentrated the thermal energy that was already present in the wood. index

  46. 6. A student is standing on a sunny, sandy beach. The student says the bottoms of her feet feel warm. Thermal energy is transferred to her feet by: A. Radiation B. Convection C. Conduction index

  47. Waves

  48. A B D C How many of the labeled items can you name? • All 4 • 3 • 2 • 1 • 0

  49. What is the wavelength of this wave? • 6.0 m • 1.5 m • 0.5 m • 0.75 m 1m 6 m

  50. As an ambulance approaches you, the frequency of the siren sound________ & the wavelength _________. • Increases, decreases • Decreases, increases • Increases, increases • Decreases, decreases

More Related