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A body of mass 5 kg explodes at rest into three fragments with masses in the ratio 1: 1: 3. The fragments with equal masses fly in mutually perpendicular directions with speeds of 21 m/s. The velocity of heaviest fragment in m/s will be

(a) 7 sqrt2

(b) 5 sqrt2

(c) 3 sqrt2

(d) sqrt2

Simran Bhatia , 12 Years ago
Grade 11
anser 1 Answers
Hrishant Goswami

(a)

Masses of the pieces are 1, 1,3 kg.  Hence    

(1 × 21)2 + (1 × 21)2 = (3 × V)2

That is, V = 7sqrt2

Last Activity: 12 Years ago
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