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A square plastic chunk with mass 0.750 kg is suspended from the lower end of a...

A square plastic chunk with mass 0.750 kg is suspended from the lower end of a light cord that is 1.76 m long. The plastic chunk is stay still in the beginning without any motion. A bullet with mass 0.0116 kg is on the way to the plastic chunk with a horizontal velocity Vo. The bullet hits the plastic chunk and then embedded in it. After collision, combined bullet and plastic chunk swings on the end of the cord. When the plastic chunk has risen a vertical height of 0.800 m , the tension in the cord is 4.60 N .

What was the initial velocity Vo of the bullet?

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Answer #1

As V1= 0.134V0

V0=5.16/0.134

V0=38.51m/s

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