(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

The spring has a force constant of 355N/m. The spring is compressed 5.9 cm and the ball has a mass of 0.029kg. The gun is held horizontal. The barrel of the gun is 5.9 cm long so the ball leaves the barrel at the same point it loses contact with the spring. A resisting force of 6.1N acts on the ball as it moves along the barrel.

Find the speed of the ball as it leaves the barrel.

2. Relevant equations

Ki + Ui + Wf = Kf + Uf

3. The attempt at a solution

Ki = 0 and Uf = 0 so

1/2 kx^{2}+ W = 1/2mv^{2}

1/2 (355N/m)(.059^{2}) - 6.1N(.059m) = 1/2(.029kg)(v^{2})

V = 4.21 m/s

Thank you for any help :)

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# Homework Help: Ball being shot out of a spring gun - Velocity

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