Homework Help: physics

Posted by savy on Friday, October 7, 2011 at 12:44am.

A 4.3 g bullet leaves the muzzle of a rifle with a speed of 306 m/s. What force (assumed constant) is exerted on the bullet while it is traveling down the 0.89 m long barrel of the rifle?

physics - Henry, Saturday, October 8, 2011 at 12:23pm
a = (Vf^2 - Vo^2) / 2d,
a = ((306)^2 - 0) / 1.78 = 52,605m/s^2.

F = ma = 0.0043kg * 52,605 = 226N.

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