A uniform solid ball rolls smoothly along a floor, then up a ramp inclined at 15.0°. It momentarily stops when it has rolled 1.50 m along the ramp. (a) What was its initial speed? First of all I'm assuming that the initial speed is the linear and not the angular speed is this right? Originally I was using Li=Lf where L=Iw however that is with angular speed and not linear speed. Would this problem involve using kinematics at all? What's throwing me off is which speed it is referring to. Any help is appreciated.