A body of mass 50 gram, initially at rest, is
forced to move by a constant force of 400 dyne
lasting for an interval of 5 seconds. Final veloc-
ity of the body is
W 40 cm/s
(2) 80 cm/s
(3) 120 cm/s
(4) 20 cm/s
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i think your amswer is 4................
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