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Pendulum - maximum kinetic energy, maximum potential energy

  • Thread starter jimmy42
  • Start date
  • #1
51
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Is it correct to think that a pendulum which is at equilibrium has full kinetic energy? Then at it's maximum amplitude it has full potential energy?

thanks.
 

Answers and Replies

  • #2
389
0


Yeah. Thats correct.
 
  • #3
51
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Is that energy transferred to the bob?
 
  • #4
389
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When the bob starts off at its initial position, it has gravitational potential energy but no kinetic energy.

When it reaches the bottom ( i wouldn't say equilibrium) it will have max KE.
So yes, there is a CHANGE in the energy.

But the total energy that the bob initially had never changed.
 
  • #5
51
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So, if a bob has a mass of 10kg and it moves 10m in the x direction is the energy to get it there = mgh= so 10kgx9.81ms^-2x10m = 981J?

Thanks.
 
  • #6
389
0


You will need to calculate the absolute change in height.

Usually we take the vertical axis as y direction, and horizontal as x direction.

So when you say in the x direction do you mean horizontal? Cause if thats what you mean, then it is incorrect. You will have to take the change in height.
 

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