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The Fundamental Equation of Dynamics

Problem 1.101

Having gone through a plank of thickness h,h, a bullet changed its velocity from v0v_{0} to v.v . Find the time of motion of the bullet in the plank, assuming the resistance force to be proportional to the square of the velocity.

Reveal Answer
t=h(v0−v)v0vln⁡(v0/v)t=\frac{h\left(v_{0}-v\right)}{v_{0} v \ln \left(v_{0} / v\right)}
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