Question

9. A 3.00-g copper penny at 25.0' C drops 50.0 m to the ground. (a) If 60% of the initial potential energy associated with the penny goes into increasing its internal energy, determining the final temperature of the penny. (b) Does the result depend on the mass of the coin? Explain.

Answer 1

NO, because it depepnds on the velocity of the penny.

Answer 2

Get the change in potential energy = m g h.

Use 0.6 m g h to raise the temperature of the penny,
= (specific heat of copper)(mass)(T - 25oC).

Artificial example, as heat conduction to the
atmosphere will tend to cool the penny to
near ambient temperature (near 25).