Analytical mechanics for students of physics and engineering (1913)
Dadourian, Haroutune Mugurditch, 1878- · New York, D. Van Nostrand company · leaf 241
nded body is about the same asthat of a freely falling body. Whenl^mn then ti = 0. Therefore thevelocity of the falUng body changesvery slowly. 3. A uniform rectangular trapdoor,which is held in a vertical position, isallowed to fall. Supposing the hingesto be smooth and horizontal, find… … G mg- sin 6. Putting this value of G in thetorque equation we get I<b mqa ■ n■■ —^ sm 6. Li Energy Method. — In turningthrough an angle Q the door acquiresa kinetic energy of § /oj^ and losesfrom its potential energy an amountequal to mgh. Therefore the energyequation gives - 70)2 = mgh = ™&…
Mechanics, Analytic
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