A 50-kg bicyclist coasts up a hill. What is the cyclist change in kinetic energy as her altitude changes from 15m to 20m?
A) 0 joules
B) approximately 2,500 joules
C) approximately 7.500 joules
D) approximately 10.000 joules

B) approximately 2,500 joules

Explanation:

The kinetic energy is transformed into potential energy. So, the increase of potential energy or approximately 2,500 joules is the loss in kinetic energy.

the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.

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