1. Circular Motion - $100 A wheel spins at 498 rpm. What is its angular speed? A.3.2 rad/s B.26 rad/s C.52 rad/s D.81 rad/s

2. Circular Motion - $200 A Ferris wheel starts at rest and builds up to a final angular speed of 0.70 rad/s while rotating through an angular displacement of 4.9 rad. What is its average angular acceleration? A.0.10 rad/s 2 B.0.05 rad/s 2 C.1.8 rad/s 2 D.0.60 rad/s 2

3. Circular Motion - $300 Consider a point on a bicycle tire that is momentarily in contact with the ground as the tire rolls across the ground at a constant speed. The direction for the acceleration for this point at that moment is _____. A.upward B.down toward the ground C.forward D.There is zero acceleration

4. Circular Motion - $400 An object of mass 0.50 kg is transported to the surface of Planet X where the object’s weight is 20 N. The radius of the planet is 4.0 x 10 6 m. What is the mass of planet X? A.1.3 x 10 20 kg B.1.7 x 10 23 kg C.9.6 x 10 24 kg D.2.1 x 10 26 kg

5. Rotational Dynamics - $100 Loosening a certain rusty nut requires a torque of 10 N·m. If the maximum force one is capable of exerting is 50 N at a 90° angle, how long must the wrench be? A.0.10 m B.0.25 m C.0.15 m D.0.20 m

6. Rotational Dynamics - $200 According to Newton’s 2 nd law, the angular acceleration experienced by an object is _______ proportional to its moment of inertia and _______ proportional to the applied torque. A.directly, directly B.directly, inversely C.inversely, directly D.inversely, inversely

7. Rotational Dynamics - $300 A car is just able to go around a turn of radius 30 m at a speed of 15 m/s without sliding. What is the coefficient of friction between the tires and the road? A.0.76 B.0.50 C.1.31 D.It is necessary to know the mass of the car.

8. Rotational Dynamics - $400 A 4.0 kg solid sphere (radius = 0.12 m) rolls without slipping down a 1.2 m high ramp. What is its speed at the bottom of the ramp? A.4.1 m/s B.4.7 m/s C.2.4 m/s D.3.4 m/s

9. Waves - $100 A traveling wave train has wavelength 50 cm and a speed of 20 m/s. What is its frequency? A.0.40 Hz B.2.5 Hz C.10 Hz D.40 Hz

10. Waves - #200 A certain standing wave is created in a 1.5 m long string. The wave has a total of 5 nodes. What is the wavelength of the standing wave? A.0.30 m B.0.60 m C.0.75 m D.0.90 m

11. Waves - $300 For a spring-mass oscillating system, at what point is the acceleration of the mass equal to zero? A.At the endpoint B.At the midpoint (equilibrium pt) C.The acceleration is never zero. D.It depends on the mass and the spring constant.

12. Waves - $400 By what factor should the length of a simple pendulum be changed in order to make the frequency of oscillation equal to 1/3 rd of its original value? A.1/3 rd as long B.1/9 th as long C.3 times as long D.9 times as long

13. Sound - $100 A sound wave in air has a frequency of 500 Hz and a wavelength of 0.68 m. What is the air temperature? A. 0°C B. 15°C C. 27°C D. −18°C

14. Sound - $200 A car with its horn stuck on moves away from a stationary observer at 18 m/s. If the frequency of the horn is 813 Hz, what does the observer hear? (Speed of sound = 340 m/s) A.856 Hz B.858 Hz C.770 Hz D.772 Hz

15. Sound - $300 A closed organ pipe has a length of 4.50 m. What is the fundamental frequency of this organ pipe? (Assume the speed of sound is 340 m/s) A.19 Hz B.38 Hz C.76 Hz D.85 Hz

16. Sound - $400 A very loud train whistle has a power output of 100 W. What is the sound intensity level (decibel level) at a distance of 100 m from the train? A.78.3 dB B.89.0 dB C.95.0 dB D.81.6 dB

17. Light - $100 A ray of light strikes a reflective surface at a 40° angle of incidence. What is the angle between incident and reflected rays? A.40° B.50° C.80° D.100°

18. Light - $200 A monochromatic light source emits a wavelength of 490 nm in air. When passing through a liquid, the wavelength is 429 nm. What is the liquid’s index of refraction? A.1.14 B.1.26 C.1.33 D.1.49

19. Light - $300 Which best describes the image of a concave mirror when the object is located somewhere between the focal point and the center of curvature? A.Virtual, upright, magnified B.Real, inverted, diminished C.Virtual, upright, diminished D.Real, inverted, magnified

20. Light - $400 A 4.0 cm tall object is 6.0 cm from a thin converging lens that has a focal length of 9.0 cm. What are the respective values of the image distance and height of the image? A. −18 cm and 12 cm B.18 cm and −12 cm C.−18 cm and −12 cm D.18 cm and 12 cm

21. Electricity - $100 Two charges, q 1 and q 2 are separated by a distance r. If q 1 and r are doubled, while q 2 remains the same, what will be the effect on the electric force between the particles? A.Remains the same B.Half as large C.Twice as large D.Four times as large

22. Electricity - $200 Three 2.0-V batteries in series power a circuit with a 4-ohm resistance. What is the current in this circuit? A.0.50 A B.0.67 A C.1.5 A D.2.0 A

23. Electricity - $300 Three resistors of 2.0-Ω, 5.0-Ω, and 10.0-Ω respectively, are connected in parallel. What is the equivalent resistance? A.0.80 Ω B.1.25 Ω C.5.67 Ω D.17 Ω

24. Electricity - $400 If a 500-W heater carries a current of 4.0 A, what is the resistance of the heating element? A.11.2 Ω B.85.7 Ω C.42.8 Ω D.31.3 Ω