a bullet moving with a velocity of 300 m/sec is just able to pierce a block of wood 2.0cm thick. if it is required to pierce a block of wood 18cm thick ots velocity should be
a. 90m/sec. b. 900m/sec. c.9000m/sec. d. 9m/sec
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dashhh:
some calculation error in the ans
the ans is 900 m/sec
there is no option
kk
it is option b
kk
thanks
kk
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1
Explanation:
K.E of bullet =Work done by friction force
Friction Force=F
- assume F is same in both the equations
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