Register to reply 
Force from a Kinetic Energy Function 
Share this thread: 
#1
Oct2313, 01:15 PM

P: 3

Say you're given a function that represents the kinetic energy of some object, what would you have to do to derive the force from that function? I know that for motion along a straight line a conservative force F(x) is the negative derivative of its associated potential energy function U, but what is there to do if the function is one of kinetic energy?



#2
Oct2313, 07:11 PM

Homework
Sci Advisor
HW Helper
Thanks
P: 12,974

Conservation of energy and the workenergy relation will be useful in such cases.
You usually will need more information than kinetic energy with position alone. Do you have an example. Note: For a conservative field, the force on an object at a position is the negative gradient of the potential energy function at that position. Motion does not have to be along a straight line. 


#3
Oct2313, 08:58 PM

P: 1,970

You posted this same thing in the homework section.
I mean the OP, of course. 


#4
Oct2313, 09:03 PM

Homework
Sci Advisor
HW Helper
Thanks
P: 12,974

Force from a Kinetic Energy Function



#5
Oct2313, 09:23 PM

P: 1,970

Ok, now we have an infinite loop.
I can go forever between the two threads, by using your links. 


Register to reply 
Related Discussions  
Force in kinetic energy/force in momentum =1  Introductory Physics Homework  2  
Kinetic energy and normal force  Introductory Physics Homework  2  
Get force from kinetic energy  Introductory Physics Homework  13  
Kinetic energy (Force and d(x))  Introductory Physics Homework  1  
Force and Kinetic Energy  Introductory Physics Homework  2 