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Science · Advanced Physics
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This print-out should have 10 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. 001 10.0 points A machine part rotates at an angular speed 6 rad/s of 0.24 rad/s; its speed is then increased to t 1.36 rad/s using an angular acceleration of 0.86 rad/s Find the angle through which the part ro- tates before reaching this final speed. If the system rotates in the zy plane about Answer in units of rad. the z axis (origin, O) with an angular speed of 6 rad/s, calculate the moment of inertia of 002 (part 1 of 4) 10.0 points the system about the z axis. A potters wheel of radius 18 cm starts from Answer in units of kg m rest and rotates with constant angular accel- eration until at the end of 27 s it is moving 007 (part 2 of 2) 10.0 points with angular velocity of 19 rad/s. Find the rotational energy of the system. What is the angular acceleration? Answer in units of J. Answer in units of rad/s? 008 (part 1 of 3) 10.0 points 003 (part 2 of 4) 10.0 points What is the linear velocity of a point on the Three particles of mass 8 kg, and kg rim at the end of the 27 s? are 3 kg, 7 Answer in units of m/s. connected by rigid rods of negligible mass lying along the y axis and are placed at 7 m. -3m, and -8m, respectively as in the figure. 004 (part 3 of 4) 10.0 points The system rotates about the z axis with an What is the average angular velocity of the angular speed of 2.8 rad/s. wheel during the 27 s? Answer in units of rad/s. 005 (part 4 of 4) 10.0 points Through what angle did the wheel rotate in 7 m the 27 s? Answer in units of rad. 006 (part 1 of 2) 10.0 points 2.8 rad/s Four particles with masses 4 kg, 6 kg, 2 kg, and 2 kg are connected by rigid rods of neg -8 m ligible mass as shown. The origin is centered on the mass in the lower-left corner. The rectangle is 4 m wide and 4 m long. Find the moment of inertia about the z axis. Consider the masses to be point parti- cles. Answer in units of kg
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