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JEE Main Physics question

PhysicsSystems of Particles and Rotational MotionJEE Main

1 kg body explodes into three fragments. The ratio of their masses is 1:1:3. The fragments of same mass move perpendicular to each other with speeds 30 ms⁻¹, while the heavier part remains in the initial direction. The speed of the heavier part is [BCECE 2005]

Answer: (B)

Solution

With total mass divided in ratio 1:1:3 (units of 0.2 kg), the two 0.2 kg fragments each carry momentum 0.2×30 = 6 kg·ms⁻¹

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Question ID VK-153674