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Physics Review

Physics Review. Final 2012. The shortest distance between two points where the wave pattern repeats is the _____. amplitude wavelength frequency period. . A knife is made up of these two simple machines: lever and inclined plane wedge and screw lever and wedge

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Physics Review

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  1. Physics Review Final 2012

  2. The shortest distance between two points where the wave pattern repeats is the _____. • amplitude • wavelength • frequency • period 

  3. A knife is made up of these two simple machines: • lever and inclined plane • wedge and screw • lever and wedge • wedge and inclined plane 

  4. The speed of a wave is equal to_____ times wavelength. • amplitude • wavelength • frequency • period 

  5. The linear momentum of an object is equal to mass times ______. • time • impulse • acceleration • velocity 

  6. What is the period of a wave with a with a frequency of 2 Hz? • 2 s • 0.5 s • 0.5 Hz 

  7. A tennis ball and a ping pong ball are both shot from a slingshot with equal speed. Which object has the least kinetic energy? • the tennis ball • the ping pong ball 

  8. Rotational kinetic energy depends on an object’s ______. • moment of inertia • linear velocity • resonance 

  9. Mechanical energy is the sum of______. • elastic and inelastic potential energy • kinetic and potential energy 

  10. If the mechanical advantage of a simple machine is less than 1, the effort force is ____ the resistance force. • greater than • less than 

  11. If you double the velocity of an object, what happens to the kinetic energy? • It is doubled. • It is quadrupled. • It is cut in half. • It is cut in one quarter. 

  12. This wave behavior occurs when two or more waves move through a medium at the same time. • refraction • resonance • reflection • interference 

  13. True or False: Angular momentum depends on how fast something is spinning. • true • false 

  14. Neglecting air resistance, the initial horizontal velocity of a projectile is _____ its final horizontal velocity. • greater than • less than • equal to 

  15. True or False: Angular momentum depends on which direction something is spinning. • true • false 

  16. In which of the following situations is work done by a bowling ball by gravity? • picking up the bowling ball • carrying the bowling ball to the lane • dropping the ball 

  17. How much power is generated by doing 50 J of work in 10 s? • 500 W • 5 W • 500 Js • 5 N/s 

  18. A wave carries _____ through space. • energy • matter • both energy and matter 

  19. Janet spikes a volleyball with a force of 20 N. Her hand is in contact with the ball for 0.5 m. The ball weighs 3 N. How much kinetic energy does the ball gain? • 40 J • 1.5 J • 10 J • 6 J 

  20. What are the units of power? • newtons • joules • watts 

  21. The smallest change in momentum will be produced by a ______. • small force acting over a long time • small force acting over a short time • large force acting over a short time 

  22. The velocity vector for an object in uniform circular motion is _____? • pointed toward the center of the circle • pointed away from the center of the circle • tangent to the circle 

  23. What is the momentum of a 500 g rock thrown at a speed of 10 m/s? • 5 kgm/s • 5000 kgm/s • 50 kgm/s • 0.05 kgm/s 

  24. A gymnast dismounting from the balance beam has a greater angular velocity in the ______. • tuck position • fully extended position 

  25. What formula can be used to find the tangential velocity of an object in uniform circular motion? • Fc = mv2 • r • vf = vi + at • a = v • t 

  26. An object in uniform circular motion has an acceleration that is_____. • toward the center of the circle • away from the center of the circle • in a direction tangential to the circle 

  27. Suppose you weigh 50 N. What is the change in your potential energy if you walk up a 3 m staircase? • 15 J • 15 W • 150 J • 150 W 

  28. A ______ wave travels in a direction parallel to its displacement? • transverse • longitudinal 

  29. The energy in a stretched rubber band is _____. • elastic potential energy • inelastic potential energy • elastic kinetic energy • inelastic kinetic energy 

  30. The horizontal and vertical components of a projectile’s velocity are ____. • independent of each other • inversely proportional • directly proportional • equal 

  31. An axe is made up of these two simple machines: • lever and wedge • lever and inclined plane • wedge and screw • wedge and inclined plane 

  32. Marble A has twice the mass of marble B. Marble A hits marble B. The force marble A exerts on marble B ____ compared to the force of marble B on marble A. • is equal in magnitude and opposite in direction • is equal in magnitude and direction • is not equal in magnitude 

  33. The bending of waves at the boundary of two different media is • diffraction • incidence • refraction • reflection 

  34. What are the units of work? • watt • newton • pound • joule 

  35. Movers are using a pulley system to lift a piano. The movers pull the rope 3 m and the piano raises 0.5 m. The dr is • 3 • 0.5 • 1.5 

  36. Gears are based on this simple machine: • pulley • lever • screw • wheel and axle 

  37. How much work did Larry do to lift a 5 kg book 1 m? • 0.1 J • 0.5 J • 5 J • 50 J 

  38. The horizontal acceleration of a projectile after it is fired is _____. • constant • 9.8 m/s2 • zero 

  39. The vertical acceleration of a projectile after it is fired is _____. • -9.8 m/s2 • zero 

  40. How can you find the IMA or MA of a pulley system? • count the number of pulleys • count the number of ropes • count the number of ropes supporting the load 

  41. What formula can be used to calculate centripetal force? • F = mg • F = kx • F = mv2/r 

  42. True or False: Angular momentum depends on an object’s moment of inertia. • true • false 

  43. Which type of electromagnetic waves has the greatest frequency and energy? • infrared • radio • gamma • x-rays 

  44. What formula can be used to find impulse? • pf - pi • p = mv • P = W/t 

  45. True or False: Angular momentum depends on linear velocity. • true • false 

  46. Which type of electromagnetic waves has the least frequency and energy? • infrared • radio • gamma • x-rays 

  47. How far does an object in uniform circular motion travel during one period? • 2r • r2 • v2/r 

  48. Fire a rifle horizontally and drop a bullet at the same time. Which hits the ground first? • the bullet you fired • the bullet you dropped • they hit the ground at the same time 

  49. An airbag is effective because it decreases the amount of force by _____. • increasing the time interval over which it acts • decreasing the time interval over which it acts. • reducing the time interval over which it acts to zero. 

  50. Which formula can you use to find the potential energy stored in a spring? • PE = mgh • P = W/t • PE = ½ k x2 

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