The only force acting on a 2.7 kg body as it moves along the positive x axis has an x component Fx = - 6x N, where x is in meters. The velocity of the body at x = 3.0 m is 8.0 m/s.(adsbygoogle = window.adsbygoogle || []).push({});

What is the velocity at x = 4?

I found it to be 0.22m/s but my friends swear up and down it's not. Could I get a second opinion on this answer? My work is something like this:

F = -6x

a = -6/2.7 * x

v = -3/2.7 * x^2 +c

v(3) = 8

8 = -3/2.7 * 3^2 + c

c = 18

v(4) = -3/2.7 * 4^2 + 18

v(4) = 0.222

Corrections please? Thanks in advance.

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# Homework Help: Kinematics: force along x-axis problem

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