# Physics 1401

## Online Quiz 9

### Chapter 8 in Conceptual Physics 12th edition

Question 1. Inertia depends on mass: rotational inertia depends on mass and
(a) phase of the moon
(b) the object's color
(c) distribution of mass about the rotation axis
(d) temperature
(e) size

Question 2. For an object in equilibrium, the sum of the clockwise torques and the sum of the counterclockwise torques must
(a) be the same
(b) double
(c) triple
(d) all be zero
(e) reverse directions

Question 3. For an object in stable equilibrium, a line from the center of mass of the object to the center of the earth should be
(a) zero
(b) removed
(c) external
(d) within the base of support
(e) released from constraint

Question 4. If the incredible rotating student pulls the heavy weights in toward his chest so that his rotational inertia is reduced to half of its initial value, then his angular momentum will
(a) double
(b) be cut in half
(c) remain the same
(d) become unstable
(e) drop immediately to zero

Question 5. For the previous question, the student's rotational speed will
(a) double
(b) be cut in half
(c) remain the same
(d) become unstable
(e) drop immediately to zero

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