- #1
UrbanXrisis
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- 1
The potential energy of an object is given by U(x)=0.5kx^2+3kx, where U is joules, x is in meters and k is a constant. What is the force acting on the object when x=0?
PE=Fd
0.5kx^2+3kx=Fd
0.5kx+3k=F
F=3k
The answer is -3k, why?
PE=Fd
0.5kx^2+3kx=Fd
0.5kx+3k=F
F=3k
The answer is -3k, why?