I have a physics problem I have been trying to figure out for a week and I'm now to the point of way past frustrated. The question is:(adsbygoogle = window.adsbygoogle || []).push({});

An object with the mass 1.44*10^-27 kg is propelled at an initial speed of 3.84*10^5 m/s toward a fixed nucleus 4.80 m away. The object is repelled by the nucleus with the force F= a/x^2 where x is the seperation between the object and the nucleus and a = 2.59*10^-26 Nm^2. What is the speed of the object when it is 7.46*10^-10 from the nucleus?

I have tried many ways to solve this to the point of I dont know what I'm doing anymore and just trying to plug in numbers into equations and still not getting the right answer of 3.15*10^5.

equations:

F=m*a

final speed^2=initial speed^2+2*acceleration*distance

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# Homework Help: Finding velocity with changing distance and acceleration

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