Question

PLease help me with these two multiple choice questions. only help if you know how to do it 100% and please explain the reason of choosing answer and draw if nessesary. Please write clearly

C 15 Two spools with equal radii and equal masses are wound onto opposite ends of a massless string, the center of which is then hung over a massless, frictionless pulley, as in the diagram to the right. The spool on the left is a solid cylinder, while the one on the right is hollow. The two spools are released from rest at equal heights and are allowed to fall unwind. The string does not slip across any of the surfaces it contacts. A little while later, which of the following is observed? [Hint: Force diagrams and applications of Newton's 2nd la for both linear and rotational motion may help.] O O a. The solid spool is at the same height as the hollow spool and the pulley is rotating clockwise. b. The solid spool is at the same height as the hollow spool and the pulley is rotating counterclockwise c. The solid spool is lower than the hollow spool and the pulley is rotating clockwise. d. The solid spool is lower than the hollow spool and the pulley is rotating counterclockwise. e. The solid spool is lower than the hollow spool and the pulley is stationary C 16 Consider the frictionless turntable in the diagram to the right. At the moment depicted in the diagram, there is a constant torque applied to the turntable, speeding up its rotation in the direction indicated. If an additional constant torque is applied to this turntable that is greater in magnitude than the original torque, but is in the opposite direction, which of the following correctly describes what happens to the rotational kinematics vectors immediately after the new torque is applied? a. The rotational acceleration vector points out of the page and is increasing in magnitude. b. The rotational acceleration vector points in the page and is decreasing in magnitude The rotational velocity vector points out of the page and is increasing in magnitude d. The rotational velocity vector points into the page and is decreasing in magnitude e. Two of the above are true

Answer 1

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Os This acto mis act 门0,2门,5门 2 2 It means torque oD Tinq s geater than torq u which means bollous wil Pai first 2 String o pullei tate clockuise

option c is correct