A Ball Is Projected into the Air with 100 J

question 82

Multiple Choice

A ball is projected into the air with 100 J of kinetic energy which is transformed to gravitational potential energy at the top of its trajectory. When it returns to its original level after encountering air resistance, its kinetic energy is

• A) more than 100 J.
• B) 100 J.
• C) less than 100 J.
• D) not enough information given

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