A toy gun's spring (k = 800 N/m) is compressed 0.05 m and launches a 20 g ball. Ignoring losses, the ball's speed is:

  1. 10 m/s
  2. 20 m/s
  3. 5 m/s
  4. 14.1 m/s
Answer

A) 10 m/s

12kx^2 = 12mv^2 Rightarrow v = x km = 10 m/s. SLO P-11-B-28 · Application

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