A 67.0-g block carrying a charge Q = 36.0 µC is connected to a spring for which k = 72.0 N/m. The block lies on a frictionless, horizontal surface and is immersed in a uniform electric field of magnitude E = 4.98 104 N/C directed as shown in the figure below. The block is released from rest when the spring is unstretched (x = 0).
(a) By what maximum distance does the block move from its initial position?
So for this part I tried E=F/Q where F=kx, but I'm getting the wrong answer for some reason.
(b) Find the subsequent equilibrium position of the block and the amplitude of its motion.
position cm
amplitude cm
(c) Using conservation of energy, find a symbolic relationship giving the potential difference between its initial position and the point of maximum extension in terms of the spring constant k, the amplitude A, and the charge Q.
I really just want formulas, but if you are willing to go through the whole process of explaining in detail, it would be appreciated.
Thank you!
Update:It's just a spring...with a block..on a horizontal surface. That's all they give.
Answers & Comments
Verified answer
Where's the figure? Do you have a link to it? If not, I'll need to know what direction the electric field is directed in, positive or negative. Gimme a coordinate system here.
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