Question

A yo-yo is released from your hand with the string wrapped around your figure. If you hold your hand still, the acceleration of the yo-yo us -
A. downward, much greater than `g`
B. downward, much less than `g`
C. upward, much less than `g`
D. upward, much greater than `g`

Answer 1

Correct Answer - B
`mg - T = ma` …..(1)
`TR = I alpha rArr TR = I (a)/( R)`
`T = (I a)/(R^(2))` ….(2)
From (1) and (2)
`mg - (Ia)/(R^(2)) = ma rArr a = (g)/(1 + (I)/(mR^(2)))`.
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