Consider the demo that you saw in class, in which a person stands on a platform...
Consider the demo that you saw in class, in which a person stands on a platform that is free to rotate. They are initially at rest.
Someone hands them a bicycle wheel of radius r = 30 cm that is full of concrete, and thus has a mass of m=4kg You may model the person as a cylinder (I=1/2mr^2) of mass 80kg and radius 20 cm.
Suppose that the bike wheel is initially spinning horizontally at an angular velocity of ω0 = 50 rad/s. The person turns the bike wheel over, so that it is spinning in the opposite direction at the same angular velocity.
What will happen to the angular velocity of the person after they do this?
Homework Answers
Add Answer to:
Consider the demo that you saw in class, in which a person
stands on a platform...
A person with mass mp = 74 kg stands on a spinning platform disk with a...
A person with mass mp = 74 kg stands on a spinning
platform disk with a radius of R = 2.37 m and mass md =
184 kg. The disk is initially spinning at ? = 1.9 rad/s. The person
then walks 2/3 of the way toward the center of the disk (ending
0.79 m from the center).
1) What is the total moment of inertia of the system about the
center of the disk when the person stands...
A person with mass mp-76 kg stands on a spinning platform disk with a radius of...
A person with mass mp-76 kg stands on a spinning platform disk with a radius of R = 2.04 m and mass md-193 kg. The disk is initially spinning at ω = 1.8 rad/s. The person then walks 2/3 of the way toward the center of the disk (ending 0.68 m from the center) the disk? kg-m2 Submit 2) What is the total moment of inertia of the system about the center of the disk when the person stands at...
A person with mass mp = 79 kg stands on a spinning platform disk with a...
A person with mass mp = 79 kg stands on a spinning platform disk with a radius of R = 1.86 m and mass md = 183 kg. The disk is initially spinning at ω = 1.8 rad/s. The person then walks 2/3 of the way toward the center of the disk (ending 0.62 m from the center). 1) What is the total moment of inertia of the system about the center of the disk when the person stands on...
A person with mass mp = 76 kg stands on a spinning platform disk with a...
A person with mass mp = 76 kg stands on a spinning platform disk
with a radius of R = 1.89 m and mass md = 191 kg. The disk is
initially spinning at ω = 1.6 rad/s. The person then walks 2/3 of
the way toward the center of the disk (ending 0.63 m from the
center).
1)
What is the total moment of inertia of the system about the
center of the disk when the person stands on...
A person with mass ma = 75 kg stands on a spinning platform disk with a...
A person with mass ma = 75 kg stands on a spinning platform disk with a radius of R = 1.71 m and mass m-188 kg. The disk is initially spinning at ω = 1 rad/s. The person then walks 2/3 of the way toward the center of the disk (ending 0.57 m from the center). 1)What is the total moment of inertia of the system about the center of the disk when the person stands on the rim of...
A person with mass mp = 79 kg stands on a spinning platform disk with a...
A person with mass mp = 79 kg stands on a spinning platform disk with a radius of R = 1.83 m and mass md = 183 kg. The disk is initially spinning at ω = 1.8 rad/s. The person then walks 2/3 of the way toward the center of the disk (ending 0.61 m from the center). 5) What is the centripetal acceleration of the person when she is at R/3?
A person of mass 70 kg stands at the center of a rotating merry-go-round platform of...
A person of mass 70 kg stands at the center of a rotating merry-go-round platform of radius 3.4 m and moment of inertia 940 kg⋅m2 . The platform rotates without friction with angular velocity 1.6 rad/s . The person walks radially to the edge of the platform. Calculate the angular velocity when the person reaches the edge. In rad/sec Calculate the rotational kinetic energy of the system of platform plus person before and after the person's walk. In J.
A person of mass 77 kg stands at the center of a rotating merry-go-round platform of...
A person of mass 77 kg stands at the center of a rotating merry-go-round platform of radius 2.8 mand moment of inertia 840 kg⋅m2 . The platform rotates without friction with angular velocity 0.95 rad/s . The person walks radially to the edge of the platform. Calculate the rotational kinetic energy of the system of platform plus person before and after the person's walk.
A person of mass 70 kgkg stands at the center of a rotating merry-go-round platform of...
A person of mass 70 kgkg stands at the center of a rotating merry-go-round platform of radius 2.8 mmand moment of inertia 870 kg⋅m2kg⋅m2 . The platform rotates without friction with angular velocity 0.95 rad/srad/s . The person walks radially to the edge of the platform. A:Calculate the angular velocity when the person reaches the edge. Express your answer using three significant figures and include the appropriate units. B: Calculate the rotational kinetic energy of the system of platform plus...
A person of mass 55 kg stands at the center of a rotating merry-go-round platform of...
A person of mass 55 kg stands at the center of a rotating merry-go-round platform of radius 3.4 m and moment of inertia 670 kg · m2. The platform rotates without friction with angular velocity 2.0 rad/s. The person walks radially to the edge of the platform. (a) Calculate the angular velocity when the person reaches the edge. ......................... rad/s (b) Calculate the rotational kinetic energy of the system of platform plus person before the person's walk. ..........................J (c) Calculate...
A person with mass mp = 74 kg stands on a spinning
platform disk with a radius of R = 2.37 m and mass md =
184 kg. The disk is initially spinning at ? = 1.9 rad/s. The person
then walks 2/3 of the way toward the center of the disk (ending
0.79 m from the center).
1) What is the total moment of inertia of the system about the
center of the disk when the person stands...
A person with mass mp-76 kg stands on a spinning platform disk with a radius of R = 2.04 m and mass md-193 kg. The disk is initially spinning at ω = 1.8 rad/s. The person then walks 2/3 of the way toward the center of the disk (ending 0.68 m from the center) the disk? kg-m2 Submit 2) What is the total moment of inertia of the system about the center of the disk when the person stands at...
A person with mass mp = 76 kg stands on a spinning platform disk
with a radius of R = 1.89 m and mass md = 191 kg. The disk is
initially spinning at ω = 1.6 rad/s. The person then walks 2/3 of
the way toward the center of the disk (ending 0.63 m from the
center).
1)
What is the total moment of inertia of the system about the
center of the disk when the person stands on...
A person with mass ma = 75 kg stands on a spinning platform disk with a radius of R = 1.71 m and mass m-188 kg. The disk is initially spinning at ω = 1 rad/s. The person then walks 2/3 of the way toward the center of the disk (ending 0.57 m from the center). 1)What is the total moment of inertia of the system about the center of the disk when the person stands on the rim of...
Most questions answered within 3 hours.
-
Where is the error in this code sequence?
String s1 = "Hello";
String s2 = "ello";...
asked 10 months ago -
Financial data for Joel de Paris, Inc., for last year
follow:
Joel de Paris, Inc.
Balance...
asked 10 months ago -
Consider this reaction:
Al2(SO4)3 (aq)+ BaCl3
(aq) Al2Cl6 (aq)- +
3BaSO4(s) . What is the...
asked 10 months ago -
Suppose that Savneet is considering increasing her
recent random sample from 20 car rentals to 40...
asked 10 months ago -
Trucks arrive at an unloading terminal at an average rate of 120
per hour.
Trucks arrive...
asked 10 months ago -
Why are methanol and ethanol completely soluble in water while
octanol is not very little soluble....
asked 10 months ago -
A facilities manager at a university reads in a research report
that the mean amount of...
asked 10 months ago -
When the CuSO4 is rehydrated by adding water to the anhydrous
compound, is this an endothermic...
asked 10 months ago -
A ray of sunlight is passing from diamond into crown glass; the
angle of incidence is...
asked 10 months ago -
A block of mass 0.249 kg is placed on top of a light, vertical
spring of...
asked 10 months ago -
how do the kidneys compensate in the presences of acidosis
a) trigger hyperventilate
b) reserve acid...
asked 10 months ago -
Question 501 pts
The rental rate of capital to the firm increases. Which of the
following...
asked 10 months ago