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30 March, 20:11

An experiment is done to compare the initial speed of bullets fired from different handguns: a 9.0 mm and

a. 44 caliber. the guns are fired into a 10-kg pendulum bob of length l. assume that the 9.0-mm bullet has a mass of 6.0 g and the. 44-caliber bullet has a mass of 12 g. if the 9.0-mm bullet causes the pendulum to swing to a maximum angular displacement of 4.3∘ and the. 44-caliber bullet causes a displacement of 10.1∘, find the ratio of the initial speed of the 9.0-mm bullet to the speed of the. 44-caliber bullet, (v0) 9.0 / (v0) 44.

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  1. 30 March, 22:34
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    Vo = (m+M) * V1/m (conservation of momentum) V1 = âš (2*g*h) where h is the vertical displacement of the bob. (conservation of energy after the impact) h = L * (1-cosÎ) where Î is the angular displacement of the bob. (geometry)
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