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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > A ring of mass M = 90 gram and radius R = 3 meter is kept on a frictionless horizontal surface such that its plane is parallel to horizontal plane. A particle of mass 10 gram is placed in contact with the inner surface of ring as shown figure. An initial velocity v =2^(1/2) m/s is given to the particle along the tangent of the ring. Find the magnitude of the force of interaction in milli newton between them after 1 sec from the start.

A ring of mass M = 90 gram and radius R = 3 meter is kept on a frictionless horizontal surface such that its plane is parallel to horizontal plane. A particle of mass 10 gram is placed in contact with the inner surface of ring as shown figure. An initial velocity v =2^(1/2) m/s is given to the particle along the tangent of the ring. Find the magnitude of the force of interaction in milli newton between them after 1 sec from the start.

A railway flat car moves at a speed V. The gun barrel makes an angle α = 60∘ with the horizontal. A shell of mass m leaves the barrel at a speed v = 12 m/s relative to the barrel. Find the speed of the flat car V (in m/s) in order that it may stop after the firing. whose mass together with the artillery gun is M = 2 m