Three spools \( A, B \) and \( C \) each having moment of inertia \( I=M R^{2} / 4 \) are placed...

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Three spools \( A, B \) and \( C \) each having moment of inertia \( I=M R^{2} / 4 \) are placed on rough ground and equal force \( F \) is applied at positions as shown in Figs. (a), (b) and (c). Then
(1) frictional force on spool \( A \) acts in forward direction
(2) frictional force on \( \operatorname{spool} A \) acts in backward direction
(3) frictional force on spool \( B \) acts in forward direction
(4) frictional force on spool \( B \) and \( C \) acts in backward direction
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