A1.5 kg copper block is given an initial speed of3.00m/s on a
rough horizantal surface. because of friction, theblock finally
comes to rest.
(a)if the block absorbs 85% of its initial kinetic energy
asinternal energy, calculate its increase in temperature.
(b)what happens on the remaining energy?

a. 0.01 C

b. dissipated to outside environment

Explanation:

Let the specific heat of copper be 0.3846 kJ/kg-K or 384.6 J/kg-C

(a)The original kinetic energy of the block is:

As 85% of this kinetic energy is converted to block internal heat energy, with specific heat we can calculate the rise in temperature:

(b) the remaining 15% energy would probably be dissipated to outside environment as heat energy

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