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In preparation for shooting a ball in a pinball machine, a spring (k = 752 N/m)...

In preparation for shooting a ball in a pinball machine, a spring (k = 752 N/m) is compressed by 0.0788 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). It leaves the spring and arrives at point B, which is 0.270 m higher than point A. Ignore friction, and find the ball's speed at point B.

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