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Kinetic Energy v. Time Graph for Freefall

  • #1
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Homework Statement



Pretty simple question, just checking for confirmation. It was a small question at the beginning of a summative test, a rock was dropped off of a bridge and we were asked to graph the kinetic energy over time.

Homework Equations



1/2mv^2.

The Attempt at a Solution


I started from 0 and went upwards (exponentially). Two friends were telling me I was wrong. :( Who was right? They say it's a linear line, but I disagreed because of the v^2. Thanks for any insight.
 

Answers and Replies

  • #2
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Just think of the relationship of v with t for free fall.
 
  • #3
haruspex
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exponentially
Do you mean exponentially? You are right that it is not linear.
 
  • #4
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Just think of the relationship of v with t for free fall.
Yeah, velocity increases. Then it is squared in the formula for kinetic energy.
 
  • #5
haruspex
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Yeah, velocity increases. Then it is squared in the formula for kinetic energy.
Right, so what adjective will describe the curve?
 

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