Compare the moment of inertia of a disk of mass 2m and radius r about its central axis to the moment of inertia of a sphere of mass m and radius 2r.

Explanation:

As we know that the moment of inertia of the disc is given as

here we know that

Now for sphere the moment of inertia is given as

here we know that

now the ratio of two moment of inertia is

initial speed when it is dropped is 150 ft/s

now at the same moment the acceleration due to gravity is perpendicular to its velocity

so as we know that

now we have centripetal acceleration a = 32 ft/s^2 as its perpendicular to velocity

while tangential acceleration at the same moment will be zero

so

now radius of curvature is given as

so the radius of curvature just after it is dropped is 703.125 ft

a cold ice-tea.

pour in room temperature or cold water. cover the pitcher and refrigerate. steep white or green tea for 6 to 8 hours; steep black or oolong tea for 8 to 12 hours.jun 28, 2015