Homework Help: physics

Posted by Anonymous on Wednesday, April 11, 2012 at 9:56pm.

A 1.4-kg copper block is given an initial speed of 2.0 m/s on a rough horizontal surface. Because of friction, the block finally comes to rest.
(a) If the block absorbs 85% of its initial kinetic energy as internal energy, calculate its increase in temperature.

physics - drwls, Thursday, April 12, 2012 at 3:14am
0.85*(1/2)*M*V^2 = M C*(delta T)
C is the specific heat of copper.
You will have to look it up. You will need it in units of Joule/(kg*degC)
The copper mass M cancels out.

Solve for the temerature rise, delta T

delta T = (0.425)V^2/C

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