CBSE Class 11-science Answered
pls help
Asked by | 26 Jul, 2009, 01:48: PM
Expert Answer
The body, whose acceleration is maximum , reaches the ground earliest and the body whose acceleration is minimum, reaches the ground last.
We know that acceleration of a body rolling down the inclined plane without sliding is given by
a = g sinθ / [ 1 + ( 1/ MR2) ]
Moment of inertia of a spherical shell = 2MR2 / 3
Moment of inertia of a solid sphere = 2MR2 / 5
So, ashell = (3/5) gsinθ
and asphere = ( 5/7) gsinθ
Since acceleration of the sphere is more, starting from the same height the sphere will reach the ground first.
Answered by | 26 Jul, 2009, 04:03: PM
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