4. (7 points, suggested time 13 minutes) Two ladybags are standing on a rotating

Question

4. (7 points, suggested time 13 minutes) Two ladybags are standing on a rotating disk that is spinning counterclockwise, as shown in the figure above. Assume that friction in the bearings of the axle is negligible. i. Is the angular speed of ladybug A greater than, less than, or the same as the angular speed of ladybug B ? Greater Less The same Briefly justify your answer i. Is the linear speed of ladybug A greater than, less than, or the same as the linear speed of ladybug B ? Greater Less The same Briefly justify your answer.

Explanation / Answer

1. since every point on the disc is have same angular speed, both ladybugs will have same angular speed

Answer The same

2. formula for linear speed = r x w

Where r is radial distance of object from axis and w is angular speed. Now since both have same w, but A has greater value of r, therefore A will have greater linear speed

Answer greater

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