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A ball of mass 0.15 kg is dropped from a height 10 m, strikes the ground and rebounds to the same height. The magnitude of impulse imparted to the ball is ($g=10\ m/s^2$) nearly:
A
$4.2\ kg\ m/s$
B
$2.1\ kg\ m/s$
C
$1.4\ kg\ m/s$
D
$0\ kg\ m/s$