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Unformatted text preview: 32 are connected by a massless string over a frictionless, massless pulley and are released from rest. Use energy conservation to find (a) the velocity of the T.Dkg massjust before it hits the flCior,(b) the maximum height reached by the 4.0kg mass, and (c) the fraction of the syStem's initial mechanical energy lost when the 7.0kg mass comes to rest on the floor. Problem
34. The maximum speed of the pendulmJ bob in a grandfather clock is 0.55 m/s. tithe ~endulum makes a maximum angle of 8;0 with he vertical, what is the length of the pendulum? il . Solution
86(a),v2 !I
'I From Example = 2g(1  cos 00), or = v2/2g(1  cosBo) = (0.55 m/s)2j2(9.8 m/J2)x (1 cos 8) = 1.59 m.' ' Problem
35. A 2;Gkgmass rests on a frictionless table and is connected over a frictionless pulley to:la 4.Gkg, mass, as shown in Fig. 831. Use conservation of energy to calculate the speed of the masses after they have moved 50 cm.
FIGURE 832 Problem 36. , . Solution
If we ignore possible losses (friction and air resistance) and the energy of the string and pulley (both assumed mass...
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This note was uploaded on 07/27/2009 for the course PHYSICS 101 taught by Professor Wormer during the Spring '08 term at NYU Poly.
 Spring '08
 WORMER
 Physics, Conservation Of Energy, Energy, Work

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