A uniform rectangular door hangs at an angle a with respect to the vertical (Fig. 1.55)....

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A uniform rectangular door hangs at an angle a with respect to the vertical (Fig. 1.55). Assume that the door is displaced initially with respect to the vertical plane and then allowed to oscillate. Derive the equation for the oscillatory motion (1) of the door by Newton's second law; the angle 9 can be arbitrarily large. 84 FIGURE 1.55 Oscillating door W B H A uniform rectangular door hangs at an angle a with respect to the vertical (Fig. 1.55). Assume that the door is displaced initially with respect to the vertical plane and then allowed to oscillate. Derive the equation for the oscillatory motion (1) of the door by Newton's second law; the angle 9 can be arbitrarily large. 84 FIGURE 1.55 Oscillating door W B H

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