Totally lost, any help would be greatly appreciated

[Tonyt88]

A particle of mass m is subject to a force F(v) = -m(alpha)v^2. The initial position is zero, and the initial speed is v nought. Find x(t)

 

[kreil]

what is alpha in this problem?

 

[Tonyt88]

Nothing has been suggested for what alpha is so I really couldn't tell you, sorry perhaps this is why this problem is totally puzzling.