# Bullet

A bullet is moving with a velocity of $$30\sqrt{2}\ \si{\meter/\second}$$ is fired into a fixed target, it penetrates to a depth of $$s$$ meters. If the bullet is fired into a target of thickness $$\dfrac{s}{2}$$ meters, made from the same material, with the same velocity, what will be the bullet's velocity when it exits the target?

Assumptions

• The resistive force on the bullet in the target is a constant, independent of velocity or position.
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