3. A 3.0 * 10-3 kg copper penny drops a distance of 50.0 m to the ground. If 65 percent of the initial potential energy goes into increasing the internal energy of the penny, determine the magnitude of that increase.

Question

Physics

Saul Grimes

8 January, 05:45

3. A 3.0 * 10-3 kg copper penny drops a distance of 50.0 m to the ground. If 65 percent of the initial potential energy goes into increasing the internal energy of the penny, determine the magnitude of that increase.

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Answers (1)

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Hamza Harvey · Answer 1

The magnitude of the increase is 0.9555J

Explanation:

Potential Energy (PE) = mgh

mass (m) = 3*10^-3kg, acceleration due to gravity (g) = 9.8m/s^2, distance (h) = 50m

PE = 3*10^-3 * 9.8 * 50 = 1.47J

Increase in internal energy = 65% of 1.47J = 0.65 * 1.47J = 0.9555J