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A student rotates on a frictionless piano stool with his
Chapter 11, Problem 62P(choose chapter or problem)
Problem 62P
A student rotates on a frictionless piano stool with his arms outstretched, a heavyweight in the hand. Suddenly he lets go of the weights, and they fall to the floor. As a result, does the student's angular speed increase, decrease, or stay the same? (b) Choose the best explanation from among the following:
I. The loss of angular momentum when the weights are dropped causes the student to rotate more slowly.
II. The student's moment of inertia is decreased by dropping the weights.
III. Dropping the weights exerts no torque on the student, but the floor exerts a torque on the weights when they land.
Questions & Answers
QUESTION:
Problem 62P
A student rotates on a frictionless piano stool with his arms outstretched, a heavyweight in the hand. Suddenly he lets go of the weights, and they fall to the floor. As a result, does the student's angular speed increase, decrease, or stay the same? (b) Choose the best explanation from among the following:
I. The loss of angular momentum when the weights are dropped causes the student to rotate more slowly.
II. The student's moment of inertia is decreased by dropping the weights.
III. Dropping the weights exerts no torque on the student, but the floor exerts a torque on the weights when they land.
ANSWER:
Step 1 of 3
(a) The given scenario : A student rotates on a frictionless piano stool with his arms outstretched, a heavyweight in the hand. Suddenly he lets go of the weights, and they fall to the floor.