A projectile with mass 
and at speed 
lands in a stationary log with mass 
on a horizontal smooth surface. The projectile collision with the log is central. The projectile stops in the log after 
as shown in the figure below.
Inelastic projectile collision with log
What is the velocity of the projectile and the log after the collision?
What percentage of kinetic energy is lost in the collision?
What is the average force of the projectile on the log?
How deep does the projectile sink into the log during the collision?
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