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jreelawg
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Homework Statement
A bullet collides and embeds itself into a block hanging from a rope. The block and embedded bullet swing out to an angle of 10 degrees.
If the bullet plows 2 cm into the block before stopping, what is the coefficient of kinetic friction between the block and the bullet?
bullet has mass of .1 kg
block on pendulum of length 1 m has mass of 5 kg
Homework Equations
momentum conservation, energy conservation, Newtons laws
The Attempt at a Solution
I found the initial velocity of the bullet, 273.386 m/s^2, using momentum and energy conservation.
Thought maybe I could use, vf^2 = vi^2 + 2ax, which I guess tells me that the bullet after collision had an acceleration in the x direction of -1,868,500 m/s^2 with respect to the frame of reference of the pendulum+embedded bullet.
I thought maybe I would then use F=ma.