Name:______________________________Class:__________________ Date:__________________ Assessment Vibrations and Waves Teacher Notes and Answers 11 Vibrations and Waves SIMPLE HARMONIC MOTION 1. 2. 3. 4. 5. 6. 7. 8. 9. b a d d a c a d The system eventually stops oscillating and comes to rest. 10. 43 N/m Given m = 370 g = 0.37 kg x = 8.5 cm = 0.085 m Solution mg k= x (0.37 kg)(9.81m/s2 ) k = 0.085m k = 43 N/m Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor. Holt Physics 1 Section Quizzes Name:______________________________Class:__________________ Date:__________________ Assessment Vibrations and Waves Section Quiz: Simple Harmonic Motion Write the letter of the correct answer in the space provided. _____ 1. According to Hooke’s law, the force exerted by a spring on an object is proportional to a. the mass of the object. b. the displacement of the spring. c. the length of the spring. d. the volume of the object. _____ 2. In any system in simple harmonic motion, the restoring force acting on the mass in the system is proportional to a. displacement. b. the length of a pendulum. c. the mass. d. frequency. _____ 3. The spring constant in a given oscillating mass-spring may be changed by a. increasing the mass. b. decreasing the mass. c. decreasing the initial displacement. d. none of the above _____ 4. In an oscillating mass-spring system, the velocity of the mass is greatest when the mass is a. at the point of maximum displacement. b. halfway between the equilibrium point and maximum displacement. c. at the point where acceleration is greatest. d. at the equilibrium point. _____ 5. The period of a pendulum may be decreased by a. shortening its length. b. increasing the mass of the bob. c. moving its equilibrium point. d. decreasing the mass of the bob. _____ 6. As the swinging bob of a pendulum moves farther from its equilibrium position, the pendulum’s _______________ increases. a. frequency b. mass c. restoring force d. length Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor. Holt Physics 2 Section Quizzes Name:______________________________Class:__________________ Date:__________________ Vibrations and Waves continued _____ 7. The gravitational potential energy of the bob of a swinging pendulum is at its maximum when the bob is at a. maximum displacement. b. the equilibrium point. c. the center of its swing. d. minimum displacement. _____ 8. Stretching a spring increases its ______________ energy. a. mechanical kinetic b. gravitational potential c. vibrational kinetic d. elastic potential 9. What happens to an oscillating mass-spring system as a result of damping? _________________________________________________________________ _________________________________________________________________ 10. What is the spring constant of a spring that stretches a distance of 8.5 cm when a mass of 370 g is hung on it? Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor. Holt Physics 3 Section Quizzes