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Does a car's kinetic energy change with speed? Does the kinetic energy of a car change...

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memememe123 | Student, College Freshman | eNotes Newbie

Posted October 11, 2012 at 3:12 PM via web

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Does a car's kinetic energy change with speed?

Does the kinetic energy of a car change more when it speeds up from 10 to 15 m/s or from 15 to 20 m/s? Explain

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litteacher8 | Middle School Teacher | (Level 1) Distinguished Educator

Posted October 11, 2012 at 4:24 PM (Answer #2)

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Yes, a car's kinetic energy changes with the speed.  Think about it. If a car is going faster, it has more potential to do damage.  Cars going slower have less potential energy than cars going faster.

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memememe123 | Student , College Freshman | eNotes Newbie

Posted October 11, 2012 at 4:41 PM (Answer #3)

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Yes, a car's kinetic energy changes with the speed.  Think about it. If a car is going faster, it has more potential to do damage.  Cars going slower have less potential energy than cars going faster.

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ask996 | High School Teacher | (Level 1) Senior Educator

Posted October 11, 2012 at 7:43 PM (Answer #4)

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Yes, a car's kinetic energy changes with the speed.  Think about it. If a car is going faster, it has more potential to do damage.  Cars going slower have less potential energy than cars going faster.

I have to disagree. Kinetic energy is the energy an object possesses and relates to that object's ability to apply work on anything with which it collides. Potential energy is the relates to the a set of forces (wind) that act on a body based on the body's positioning. As litteacher indicated in the answer, the wind affect on the car is "potential energy."

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