In preparation for shooting a ball in a pinball machine, a spring (k= 675 N/m) is compressed by 0.0650 m relative to its unstrained length. The ball (m= 0.0585 kg) is at rest against the spring at point A. When the spring is released, the ball slides (without rolling) to point B, which is 0.300m higher than point A. How fast is the ball moving at B?
Note: We need additional information: either the angle between the incline or a statement which would tell whether the spring potential energy is totally lost at point B.
<br>If the spring's PE IS NOT ...