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Sahay Sir > Question Answers > Cengage JEE Mains Physics by B.M Sharma > Chapter 5 - Newton's Laws of Motion (Without Friction) > A bead of mass m is attached to one end of a spring of natural length R and spring constant K=R(3​+1)mg​. The other end of the spring is fixed at a point A on a smooth vertical ring of radius R as shown in Fig.6.301 The normal reaction at B just after it is released to move is

A bead of mass m is attached to one end of a spring of natural length R and spring constant K=R(3​+1)mg​. The other end of the spring is fixed at a point A on a smooth vertical ring of radius R as shown in Fig.6.301 The normal reaction at B just after it is released to move is

A uniform rod of mass 2M is bent into four adjacent semicircles each of radius r all lying in the same plane. The moment of inertia of the bent rod about an axis through one end A and perpendicular to plane of rod is.