A uniform body of mass M radius R has a small mass m attached at … - Vidyadip

MCQ

A uniform body of mass $M$ radius $R$ has a small mass $m$ attached at edge as shown in the figure. The system is placed on a perfectly rough horizontal surface such that mass $m$ is at the same horizontal level as the centre of body. It is assumed that there is no slipping at point $A$. If $I_A$ is the moment of the inertia of combined system about point of contact $A$ then the normal reaction at point $A$ just after the system is released from rest is ........ $N$. ($M = 6\ kg$, $m = 2\ kg,$ $I_A = 4\ kg\ m^2$, $R = 1\ m$, $g=10\ m/s^2$)

A
$60$
B
$80$
C
$75$
✓
$70$

✓

Answer

Correct option: D.

$70$

d

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