Ch8_1
Due: 10:00pm on Monday, October 18, 2010
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You should make a serious attempt at these problems before your October 18 workshop. You only have a couple of hours after the work shop to make final adjustments before the due time !!
You will do poorly in the work shop if you are unprepared. !! If you need help consult the Help Blog and/or visit the help room.
Ladybugs on a Rotating Disk
Two ladybugs sit on a rotating disk, as shown in the figure (the ladybugs are at rest with respect to the surface of the disk and do not slip). Ladybug 1 is halfway between ladybug 2
and the axis of rotation.
Part A
What is the angular speed of ladybug 1?
ANSWER:
onehalf the angular speed of ladybug 2
the same as the angular speed of ladybug 2
twice the angular speed of ladybug 2
onequarter the angular speed of ladybug 2
Correct
Part B
What is the ratio of the linear speed of ladybug 2 to that of ladybug 1?
Hint B.1
Relation between linear and angular speeds
Hint not displayed
Answer numerically.
ANSWER:
2
Correct
Part C
What is the ratio of the magnitude of the radial acceleration of ladybug 2 to that of ladybug 1?
Hint C.1
Radial (centripetal) acceleration of an object moving on a circle
Hint not displayed
Answer numerically.
ANSWER:
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 Spring '08
 STEPHENS
 Physics, Velocity, Isamu, greater magnitude

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