applied calculus

Classical Mechanics Level pending

suppose a bullet enters in a block of length 20m with velocity V o V_o .It emerges from other side of block with velocity V o / e 2 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= ζ / V o \zeta/V_o find ζ \zeta

take e = 2.72 e=2.72


The answer is 63.984.

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