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3 years ago

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A projectile of mass 0.2 kg and an initial velocity of 50 m/s collides with the end of a blade attached to a turbine. The rotati

onal inertia of the turbine is 12.5 kg⋅m2 . Assume the loss of energy of the projectile in the collision is completely transferred to the blades, causing them to spin. If the final rebound velocity of the projectile after hitting a turbine blade is −25 m/s , which of the following is most nearly the rotational velocity of the turbine after the collision?

1 answer:

fgiga [73]3 years ago

8 0

Answer:

5.5 rad/sec

Explanation:

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Explanation:

From the question we are told that

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The unstretched length is $L_{un} = 1.30m$

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The new length of the spring $L_{new} = 1.30 m$

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Where F is the force applied $= m * g = 0.5 * 9.8=4.9N$

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Now substituting values accordingly

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$E_T = \frac{1}{2} k D_{max}^2 = \frac{1}{2} k D^2 + \frac{1}{2} mv^2$

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Answer:

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