Question

A bullet moving with a velocity of 300 m/s is just able to pierce a block of wood 2.0 cm thick. If it is
required to pierce a block of wood 18 cm thick, its velocity should be
a) 90 ms
b) 900 ms
c) 9000 ms
d) 9 ms!
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Answer 1

Answer:

in my opinion velocity should be 2700ms