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Practice problems from a university-level physics course focused on solving for the linear and angular acceleration of objects, tensions in cables, and rotational inertia. Students are required to apply their knowledge of the equations for the motion of a disc's center of mass and angular motion, as well as the principles of statics and dynamics. The problems involve calculating the tension in cables, the acceleration of a descending disc, and the rotational inertia of a merry-go-round.

Typology: Exams

Pre 2010

1 / 2

Download PH 235 Practice Test 1: Linear & Angular Acceleration, Tensions, Rotational Inertia and more Exams Physics in PDF only on Docsity! KE = KEcm + KEabout cm = 1/2 mv2 + 1/2 I2 I cm disc = 1/2 MR2 PH 235 Practice Test 1 1. 25 pts. A solid 3.5-kg disc of radius 0.14 m has a light cord wrapped around it. This disc is descending as the cord unwinds, shown by the sketch. a) Write the equation for the linear motion of the disc center of mass (cm). b) Write the equation for the angular motion of the disc. c) Eliminate the tension from these two equations and solve for the acceleration of the disc cm. 2. A 30-kg child runs up to a merry go round (mgr) at a speed of 2.5 m/s and jumps on as shown in the sketch. After the child has landed, the angular speed of child and mgr is 0.12 rad/sec. Determine the rotational inertia of the 1.1 m mgr from this information. (25 pts).