About my thinking Kenetic E

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About my thinking !! Kenetic E"

last week i am thinking about the kenetic energy of the earth compared with the object that falling down .

I assume that it may be equal to 0 or ∞ but no why ??

How about you for this case ?
 

Answers and Replies

  • #2
Doc Al
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Not sure what you are asking about or why you'd compare the kinetic energy of the earth (in what frame?) to the kinetic energy of a falling object.
 
  • #3
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Ohh sorry !

Hmm , i have ever seen comparison of the K.E of object 1 to K.E of object 2 while falling down . So in this case , i want to compared with the earth instead of object 2.

thanks for answer , just doubt !
 
  • #4
Doc Al
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Hmm , i have ever seen comparison of the K.E of object 1 to K.E of object 2 while falling down . So in this case , i want to compared with the earth instead of object 2.
I'm still not understanding what you want to do. Usually, one measures the speed of the falling body--and thus its kinetic energy--with respect to the ground. What do you propose instead?
 
  • #5
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i assume that the object's mass is m Kg. and the earth's mass is M Kg.
i want to know the kenetic of object respect to the earth's while the object is falling .

it may be m/M or M/m or equal to 1 or 0 .


i try to understand to law of kenetic energy but it so hard of this case for me.
thanks for pay attention to my doubt.
 
  • #6
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the kinetic energy of the falling object is constantly changing because its velocity is changing due to the acceleration due to gravity. You must specify at what location/time you want to know the object's kinetic energy.
 

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