Friction Force - Bullet hitting a sandbag

AI Thread Summary
To determine the friction force acting on a bullet that penetrates a sandbag, the problem involves calculating the net force using the bullet's mass and deceleration. The bullet, weighing 15.5 g and traveling at 262 m/s, penetrates the sand to a depth of 24.2 cm. A force diagram is essential to visualize the forces at play, including gravitational and frictional forces. The net force equation, F_net = ma, can be applied alongside the friction force equation, fk = μkN, to solve for the friction force. Clarifying the force diagram and equations will help in finding the solution.
Kristenx2
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Homework Statement


A rifle bullet with a mass of 15.5 g traveling toward the right at 262 m/s strikes a large bag of sand and penetrates it to a depth of 24.2 cm. Determine the magnitude and direction of the friction force (assumed constant) that acts on the bullet.


Homework Equations


F⃗ net=ΣF⃗ =ma⃗, fk=μkN, \SigmaF=n+f+mg=ma


The Attempt at a Solution


I have no idea where to start. I tried drawing a force diagram, but I can't figure out how to use my givens all in one equation.
 
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A force diagram is a good place to start. Can you describe what you have so far or scan it in and post it?
 
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