1.

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 the heaviest fragment will be            [CBSE PMT 1991]

A.          11.5 m/s
B.                       14.0 m/s
C.          7.0 m/s
D.                       9.89 m/s
Answer» E.


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