7. A wheel is rolling without slipping along the floor. At which of the labeled

Question

7. A wheel is rolling without slipping along the floor. At which of the labeled points is the angular velocity of the wheel the least? A. Point:1 B. Point2 C. Point;3 D. All numbered points have the same angular velocity E. Points 1 and 3 7 8. Which of the objects to the right has the smallest critical angle? Assume they have the same width in contact with the ground, the same height, and are made of the same uniform material. A. I I. D. II and III E. I, II, and III 9. A bone is bent until a crack sound is heard and a visible gap appears between two parts of the bone. This is a situation where A. a shear stress has been applied as opposed to a torsional stress. B. the strain in the bone has exceeded the breaking point. C. the bone material is in the elastic region but has not reached the region of plastic deformation. D. the bone material has gone from pliant to rigid. E. the stress in the bone is high but the strain in the bone remains zero.

Explanation / Answer

7) Ans: (E) Points 1 and 3.

The angular velocity decreases with its distance from the center. So, as the points 1 and 3 are farthest from the center, they have the least angular velocity.

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