The only force acting on a 3.4 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({});

a) What is the velocity of the body at x = 4.0 m? m/s

(b) At what positive value of x will the body have a velocity of 5.0 m/s?

i have some kinda idea but it may not be clear

so i started with using a Formula for work since its moving along positive x direction

W=Fd cos(angle)

and kinetic energy is

K=1/2mv^2

thats all i can think off for the beginning

Plz just give me some hint how to combine these 2 formulas since angle between force and direction is 180 it will be cos180

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# Homework Help: What is the velocity of the body

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