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JEE Main Physics question

PhysicsSystems of Particles and Rotational MotionJEE Main

A shell at rest at the origin explodes into three fragments of masses 1 kg, 2 kg and m kg. The 1 kg and 2 kg pieces fly off with speeds of 5 ms⁻¹ along the x-axis and 6 ms⁻¹ along the y-axis respectively. If the m kg piece flies off with speed 6.5 ms⁻¹, the total mass of the shell must be

Answer: (B)

Solution

p₁ = (5,0), p₂ = (0,12). The third piece's momentum must be −(p₁+p₂), of

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Question ID VK-152874