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Q. A constant force of 105 N, directed upward, is applied to a 3.9 Kg toy rocket by the rocket's engine. what is the rockets acceleration?

Q. 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 test. If the block absorbs 85% of its kinetic energy, calculate its increase in temperature.

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