Driven Oscillations Worksheet Fall 2020

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Phys 151L/170L – Physics I Laboratory Experiment: Driven Oscillations Due date: Friday 11/20/20 (submission on Laulima as pdf) /49 points Instructions: Please adhere to the guidelines in the syl... labus to prepare your solution. You must show all calculations clearly. If you don't, you will not receive credit. Theory ​(3pts total, 1pt each) 1) What is the procedure for measuring the response amplitude ​A ​of the oscillation? What formula do you use to calculate it? ​One must find the max height and min height of oscillation then find the difference to get A. Thus, A=(Max height-Min height)/2 2) The response amplitude ​A ​is maximized when the driving frequency ​ω ​equals the natural frequency ​ω​0​. What is this phenomenon called? ​Resonance 3) List the three forces acting on the hanging mass attached to the spring. ​Driven force, spring force and damp force. Procedure ​(4pts total, 1pt each) 1) Describe the procedure for measuring the driving amplitude ​A​0​ ​This can be found based on the motor wheel, from center of wheel to center of screw. 2) Describe the procedure for measuring the natural frequency ​ω​0​ ​it is basically the frequency without the damping/driving effect. 3) Describe the procedure for measuring the driving frequency ​ω ​. ​To do this, one must remove the spring from the water and displace the hanging mass from rest. Then, measure five periods and calculate the average period T and sdm(T). Calculate the natural frequency from by multiplying 2 by pi and dividing by T. 4) ​What is the main source of damping in the experiment?​ ​Velocity which is proportional to the force. Data Analysis ​(18pts total, 1pt each except as specified) (7pts) Fill in the following data table, using as many extra rows as you need [Show More]

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