How Long Does It Take for a Bullet to Stop in Wood?

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To determine how long it takes for a .22 rifle bullet to stop in wood, the initial velocity is 350 m/s, and it penetrates 0.130 m. Using kinematic equations, the required acceleration can be calculated to stop the bullet, considering the constant retarding force from the wood. Once the acceleration is found, Newton's second law can be applied to find the force exerted by the wood on the bullet. The discussion emphasizes the need for a clear understanding of kinematics and Newton's laws to solve the problem effectively.
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momentum question...REALLY NEED HELP!

Homework Statement


A .22 rifle bullet, traveling at 350 m/s, strikes a block of soft wood, which it penetrates to a depth of 0.130m . The block of wood is clamped in place and doesn't move. The mass of the bullet is 1.80g. Assume a constant retarding force.

??-How much time is required for the bullet to stop? (in seconds)

??-What force, in Newtons, does the wood exert on the bullet?


Homework Equations





The Attempt at a Solution


well honestly, i have no idea where to begin... can some one please help me

 
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Kinematics, think x(t)=x0+v0*t+(1/2)*a*t^2. What acceleration is required to stop the bullet? Once you have a, what force is needed to stop the bullet? Now think of Newton's third law.
 

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