A force in the +x-direction with magnitude F(x)=18.0N−(0.530N/m)x?

A force in the +x-direction with magnitude F(x)=18.0N−(0.530N/m)x?



A force in the +x-direction with magnitude F(x)=18.0N−(0.530N/m)x is applied to a 8.10 kg box that is sitting on the horizontal, frictionless surface of a frozen lake. F(x) is the only horizontal force on the box 

If the box is initially at rest at x=0, what is its speed after it has traveled 17.0 m ? 

i got 7.207 m/s 

I don't know what i did wrong could someone explain the way of solving this





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