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July 30, 2014

Homework Help: Physics

Posted by Ana on Friday, March 19, 2010 at 7:28pm.

Four objects - a hoop, a solid cylinder, a solid sphere, and a thin, spherical shell - each has a mass of 4.59 kg and a radius of 0.252 m.

(a) Find the moment of inertia for each object as it rotates about the axes shown in the table above.
hoop____ kgm2
solid cylinder____ kgm2
solid sphere____kgm2
thin, spherical shell_____kgm2

(b) Suppose each object is rolled down a ramp. Rank the translational speed of each object from highest to lowest.

A)solid cylinder > thin spherical > solid sphere > hoop

B)solid sphere > solid cylinder > thin spherical > hoop

C)hoop > solid cylinder > solid sphere > thin spherical

D)thin spherical > solid sphere > solid cylinder > hoop



(c) Rank the objects' rotational kinetic energies from highest to lowest as the objects roll down the ramp.

A)solid cylinder > thin spherical > solid sphere > hoop

B)hoop > thin spherical > solid cylinder > solid sphere

C)hoop > solid cylinder > solid sphere > thin spherical

D)thin spherical > solid sphere > solid cylinder > hoop

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