1. Unit 7: Harmonic Motion General Concepts Review

2. All of the following are examples of harmonic motion except: A) the bouncing of a ball B) the motion of a ping pong ball during a point C) the bells ringing in an old church D) the motion of a tuning fork

3. The units of the spring constant are: A) N/m 2 B) m/N C) N/m D) they are unitless

4. To convert from ω to revolutions/second you have to: A) multiply by 2π B) divide by 2π C) multiply by 2π and then take the inverse D) divide by 2π and then take the inverse

5. How are ω and frequency related? A) they are opposites of each other B) they are inverses of each other C) ω/2π = frequency D) they aren’t

6. How are period and ω related? A) 2π/ω = T B) 2πω = T C) they are both opposites and inverses D) they aren’t

7. You’ve figured out that the ω of a spring-mass system is 2 rad/s. To figure out how many times it oscillates in 10 seconds you would: A) divide by 2π and divide by 10 B) multiply by 2π and multiply by 10 C) multiply by 2π and divide by 10 D) divide by 2π and multiply by 10

8. The restoring force in a pendulum A) is an unbalanced component of gravity B) causes the object to turn C) points straight down D) is balanced by tension

9. The reason the pendulum follows a curved path is because: A) there is a net centripetal force B) gravity fails to cancel out tension as it moves C) there is a net acceleration directed toward the pivot point of the pendulum D) all of the above

10. All of the following are true of the equilibrium point of a pendulum in motion except: A) it’s where the kinetic energy is the greatest B) it’s where the net force is zero C) it’s where the tension in the string is greatest D) it’s where frequency is the maximum

11. Imagine the world was spinning ten times as fast as it is now. How would that affect the period of a pendulum? A) each oscillation would take a little longer B) each oscillation would take a little less time C) the pendulum would be unaffected D) it’s impossible to tell with the information given