(II) A woman of mass m stands at the edge of a solid cylindrical platform of mass M and radius R. At t = 0, the platform is rotating with negligible friction at angular velocity ω 0 about a vertical axis through its center, and the woman begins walking with speed v (relative to the platform) toward the center of the platform. ( a ) Determine the angular velocity of the system as a function of time. ( b ) What will be the angular velocity when the woman reaches the center?
(II) A woman of mass m stands at the edge of a solid cylindrical platform of mass M and radius R. At t = 0, the platform is rotating with negligible friction at angular velocity ω 0 about a vertical axis through its center, and the woman begins walking with speed v (relative to the platform) toward the center of the platform. ( a ) Determine the angular velocity of the system as a function of time. ( b ) What will be the angular velocity when the woman reaches the center?
(II) A woman of mass m stands at the edge of a solid cylindrical platform of mass M and radius R. At t = 0, the platform is rotating with negligible friction at angular velocity ω0 about a vertical axis through its center, and the woman begins walking with speed v (relative to the platform) toward the center of the platform. (a) Determine the angular velocity of the system as a function of time. (b) What will be the angular velocity when the woman reaches the center?
Definition Definition Product of the moment of inertia and angular velocity of the rotating body: (L) = Iω Angular momentum is a vector quantity, and it has both magnitude and direction. The magnitude of angular momentum is represented by the length of the vector, and the direction is the same as the direction of angular velocity.
Solve and answer the question correctly please. Thank you!!
r
2. Measuring Length
mm 1
cm
2
3
INCH 1 16THS
5 6 7 8 9
10 11
FAIRGATE COLD SPRING, NEW YORK
2
3
12
1.
Using the metric (top) scale only, what units are being used for the long lines
with the numbers? Hint: Remember that 2.54 cm = 1 in.
2.
What are the units of the small lines?
3. How many decimal places should be recorded using this tool?
4. What is the length of the red line? Note: Make sure to use the correct units
and decimal places.
5. Now observe your ruler. What metric units are used on your ruler?
6. How many decimal places should you record when using your ruler?
7.
Measure a box, book, coin and can and fill out the data table below. Make
sure to use units and the correct number of decimal places for your ruler.
Table 1: Measuring Length Data Table
Object
Length of the box
Length
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V
2
217
PROBLEM 3
Cables A and B are Supporting a 185-lb wooden crate.
What is the magnitude of the tension force in each
cable?
A
20°
35°
185 lbs
Chapter 11 Solutions
Physics for Scientists and Engineers with Modern Physics
Applications and Investigations in Earth Science (9th Edition)
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