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A toy cannon uses a spring to project a 5.39-g sof
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From law of conservation of energy, V: (7.96)(4.99 x 10-2)2- -2) 2(0.0318 14.9x10 5.39 24.42×10-2 m/s The ball has maximum speed at original length of spring, That is 4.99 cm. (499x102 m) 7.96 4.99x10* m 5.39 -6.06x10-2 m/s

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