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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > Two masses A and B having mass m and 2 m respectively are kept on a smooth horizontal table as shown in the figure. The mass B is given a velocity v perpendicular to the string parallel to the table. If m = 0.3 kg, v = 5 m/s and l= 1 m, then find the tension in the string ( in N ).

Two masses A and B having mass m and 2 m respectively are kept on a smooth horizontal table as shown in the figure. The mass B is given a velocity v perpendicular to the string parallel to the table. If m = 0.3 kg, v = 5 m/s and l= 1 m, then find the tension in the string ( in N ).

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