Recent content by sciencegeek26

(1/2)m(v2^2-3^2) Instead of 3 being squared should it be 8m/s? Then I would get -69.6J

I got it to be -21J but I think I'm using the wrong equation

The only force acting on a 2.9 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. What is the velocity of the body at x=4? At what positive value of x will the body have a velocity of 5 m/s...