9. A 1.5-kg copper block is given an initial speed of 3.0 m/s on a rough horizontal surface. Because of friction, the block finally comes to rest. If the block absorbs 85% of its initial kinetic energy as internal energy, calculate its increase in temperature. You may find this information useful: ccopper = 387 J/kg·°C.
(A) 1.1 °C
(B) 11 °C
(C) 5.5 °C
(D) 3.3×10⁻³ °C
(E) 9.9×10⁻³ °C

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