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1) Two identical springs, each of spring constant k=122 N/m, are used together.

ID: 1287419 • Letter: 1

Question

1) Two identical springs, each of spring constant k=122 N/m, are used together. What is the effective spring constant if they are joined in (a) series and (b) parallel?

Answer:

(a) _______N/m;

(b) _______N/m.

A uniform disk of mass m=0.400 kg and radius R=20.0 cm is pinned to the wall near its rim. (a) Find the angular frequency of oscillation if the disk is set swing back and forth. (b) What is the maximum angular speed of rotation if the disk is released from rest with an angular displacement of ?/16?

Answer:

(a)_______ rad/s;
(b) _______rad/s.

Explanation / Answer

1. Series 244 N/m; Parallel 61 N/m

2. a. 5.72 rad/sec b. 5.72 rad/sec

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