Friday
August 28, 2015

Homework Help: Physics

Posted by J on Saturday, September 18, 2010 at 7:11pm.

A wooden boxcar is moving along a straight railroad track at speed v1. A sniper fires a bullet (initial speed v2) at it from a high-powered rifle. The bullet passes though both lengthwise walls of the car, its entrance and exit holes being exactly opposite each as viewed from within the car. From what direction, relative to the track, is the bullet fired? Assume that the bullet is not deflected upon entering the car, but that its speed decreases by 20%. Take v1=85km/hr and v2 = 650 m/s.

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