Unit D Assessment

 

Answer the following questions, and submit your answers to your teacher for marks.

  1. An object suspended from a spring with a spring constant of 2.56 N/m vibrates with a frequency of 0.148 Hz.

    1. What is the mass of the object?

    2. What will be the acceleration of the object at a displacement of –0.120 m from the equilibrium position?

    1. What length of a 0.250-kg pendulum would be needed to oscillate at the same frequency as the object in question 1?

    2. What would be the restoring force on the pendulum at an angle of 6.24° from the equilibrium position?

    3. The pendulum is pulled aside until it is 0.386 m above its lowest position and released. The pendulum is designed to emit sound waves at a frequency of 440 Hz; however, as it swings toward and away from an observer, the frequency appears to vary slightly. What is this phenomenon called? What would be the apparent frequency of the sound from the pendulum as it swings at its maximum speed toward an observer? Assume the speed of sound is 345 m/s.