Answers

2014-09-21T22:03:48+08:00
A=F/m
a=2×10∧5 N / 10000 kg
a=20 m/s²

final Velocity= initial velocity + (a×t)
V= Vo - at
V= 0 - (20m/s² × 20 sec)
V=400 m/s---> answer
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