a spring with k=128 Nm is compressed to a distance 2.0 pastequillibrium and is u

Question

a spring with k=128 Nm is compressed to a distance 2.0 pastequillibrium and is used to project a ball with mass = 4 kgdirectly up. Neglect air resistance. A)What is potential energy of the spring in its compressedposition.          256J B) What is the maximum height above its initial restingposition.          6.53m C) What is muzzle velocity when the spring reachesequillibrium. a spring with k=128 Nm is compressed to a distance 2.0 pastequillibrium and is used to project a ball with mass = 4 kgdirectly up. Neglect air resistance. A)What is potential energy of the spring in its compressedposition.          256J B) What is the maximum height above its initial restingposition.          6.53m C) What is muzzle velocity when the spring reachesequillibrium.

Explanation / Answer

  1/2 kx2 = 1/2 mv2    Therefore v = (kx2 / m) = (128 *22 /4) = 11.3 m/s    Therefore v = (kx2 / m) = (128 *22 /4) = 11.3 m/s

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