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tigerlili
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Homework Statement
a block of mass m lies on a horizontal frictionless surface and is attached to one end of a horizontal spring (spring constant k) whose other end is fixed. The block is initially at rest at the position where the spring is unstretched (x = 0) when a constant horizontal force in the positive direction of the x-axis is applied to it. A plot of the resulting kinetic energy of the block versus its position x is shown in Fig. 7-38.http://edugen.wiley.com/edugen/courses/crs1650/art/qb/qu/c07/pict_7_38.gif
Homework Equations
f= -kx
k= 1/2 mv^2
ui + ki = uf + kf
The Attempt at a Solution
i'm really confused about how to start this one :/