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Question

Two solid cylinders P and Q of same mass and same radius start rolling down a fixed inclined plane from the same height at the same time. Cylinder P has most of its mass concentrated near its surface, while Q has most of its mass concentrated near the axis. Which statement(s) is(are) correct?

A
Cylinder Q reaches the ground with larger angular speed
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B
Cylinder P has larger linear acceleration than cylinder Q
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C
Both cylinders reach the ground with same translational kinetic energy
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D
Both cylinders P and Q reach the ground at the same time
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Solution

The correct option is A Cylinder Q reaches the ground with larger angular speed
acm=gsinθ1+IcmmR2
IcmP>IcmQ
acmQ>acmP
Thus Q reaches the ground with larger angular speed.

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