applied calculus

Classical Mechanics Level pending

suppose a bullet enters in a block of length 20m with velocity \(V_o\) .It emerges from other side of block with velocity \(V_o / e^{2}\) The resistance offered by block is directly proportional to square of velocity of penetration. then the time it spends in the block=\(\zeta/V_o\) find \(\zeta\)

take \(e=2.72\)

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