JEE Main Physics question
A body at rest breaks into three parts having equal masses, and they fly off with velocities each of 12 m/s, mutually perpendicular to each other. Find the velocity of the third part which has 3 times the mass of each of the equal parts
Answer: (D)
Solution
Two parts, each of mass m, fly off at 12 m/s perpendicular to each other; the resultant of their momenta has magnitude m(12)√2 = 12√2·m, directed at 45° between them (i.e., 135° from each, since the third part's momentum must
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