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Physics Review: Momentum, Simple Machines, PE/KE, Waves

This Physics Final Exam review covers topics such as momentum, simple machines, potential energy/kinetic energy, and waves. It includes questions, formulas, and explanations.

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Physics Review: Momentum, Simple Machines, PE/KE, Waves

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  1. Jeopardy 0514FinalExamPhys2Review Momentum Simple Machines PE / KE Waves Mixed $100 $100 $100 $100 $100 $200 $200 $200 $200 $200 $300 $300 $300 $300 $300 $400 $400 $400 $400 $400 $500 $500 $500 $500 $500 Final Jeopardy

  2. What is the correct formula for momentum? Mom = m a p = mv V = IR p = mv 1 - $100

  3. 1 - $200 • Compare the momentum of a large truck moving at 30 miles per hour with a small truck moving at 30 miles per hour? • Large truck has more momentum, more mass at same velocity

  4. 1 - $300 • Impulse is a measure of the change in momentum. Which of the following is the formula for impulse? I a = ∆ mv F t = ∆ mv ∆ mv = F d / t • F t = ∆ mv

  5. 1 - $400 • Compare the momentum of a bullet being fired from a gun. Relate momentum of gun to momentum of bullet. • Equal momentum, opposite in direction. Gun = mv Bullet = mv

  6. 1 - $500 • A cannonball shot from a long-barrel cannon travels faster than one shot from a short-barrel. Why if both use same amount of gun powder? • Impulse = Force x time. More time for force to influence.

  7. 2 - $100 • What is the unit of work? a. Watt b. Joule c. Celsius • b. joule, equals n * m

  8. 2 - $200 • The SI unit of power is the a. Joule b. newton c. watt • C. watt

  9. 2 - $300 • Jody pushes on the concrete wall with 20 newton's of force, but the wall never moves. Explain the work completed by Jody. • No work was completed, the wall never moved through a distance. 20 n x 0 m = 0 J

  10. 2 - $400 • The amount by which a machine multiplies an effort force is called the ____. • Mechanical advantage

  11. 2 - $500 • What force will balance the lever? • 18n : 60 x 3 = 180 x 10 = 180

  12. 3 - $100 • What type of energy does a book have on a shelf 3 meters high? • GPE, gravitational potential energy

  13. 3 - $200 • A small 20-kilogram canoe is floating downriver at a speed of 4 m/s. What is the canoe’s kinetic energy? • KE = .5 (20) (4)2 = 160 J

  14. 3 - $300 • Which has a greater influence on the kinetic energy of an object, doubling the mass or doubling the velocity? • Velocity is squared, KE= .5 (m)(v)2

  15. 3 - $400 • A bowling ball contains 50 joules of potential energy at the top of an inclined plane. When the ball rolls down the inclined plane, how many joules of kinetic energy will it be exhibiting half way down the inclined plane? • 25 joules, half of the 50 is still PE, half KE = 50 J

  16. 3 - $500 • Which of the following is the same as the kinetic energy formula? KE = 9.8 m/s2*1/2 m 2KE = m*v 2 • KE= 1/2 (m)(v)2 , multiplying both sides by 2.

  17. 4 - $100 • Electromagnetic radiation with the highest frequency is ____. • gamma

  18. 4 - $200 • The electromagnetic waves with wavelengths slightly longer than visible light are ____. • Infrared, below red.

  19. 4 - $300 • Which of the seven bands of the E M spectrum is the next band less frequent than x-rays? • Ultraviolet

  20. 4 - $400 • Which of the seven bands listed of the visible light has the longest wavelength? (from choices) indigo yellow green • Yellow, R O Y G B I V, red is the long side.

  21. 4 - $500 • The process by which nuclei having low masses are united to form nuclei with larger masses is nuclear _____. • Fusion, fuse together

  22. 5 - $100 • Which force would describe a bottle sitting on a top shelf? unbalanced balancedkinetic • Balance, not changing what it’s doing

  23. 5 - $200 • The force that opposes the motion of objects that touches as they move past each other is called • friction

  24. 5 - $300 • The path of motion of a thrown javelin (spear) is an example of ________ motion. • (has horizontal and vertical motion) • projectile

  25. 5 - $400 • Which timer tape indicates it is moving at a constant speed? • A, same space between time marks. B moving faster, while C is moving slower.

  26. 5 - $500 • Solve for x, give 2 places after the decimal. • SOH CAH TOA, tan 61o= x__ = 5.41 cm 1 3 cm

  27. Final Jeopardy • An egg is thrown horizontally off the top row bleachers at the Brickyard, which is 40 meters high, with a horizontal velocity of 7.5 m/s. How long does it take to hit the ground? • d = .5 (g)(t)2 40 = .5(9.8)(t)2 t = 2.86 sec.

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