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# (Solved): A bail of mass $$0.250 \mathrm{~kg}$$ that is moving with a spoed of $$7.2 \mathrm{~m} / \mathrm ... A bail of mass \( 0.250 \mathrm{~kg}$$ that is moving with a spoed of $$7.2 \mathrm{~m} / \mathrm{s}$$ collides head-on and elastically with another ball initially at rest. Immodiately after the collsion, the incoming ball bounces backward with a speed of $$3.0$$ $$\mathrm{m} / \mathrm{s}$$. Calculate the velocity of the target ball after the collision. Express your answer to two significant figures and include the appropriate units. A ball of mass $$0,250 \mathrm{~kg}$$ that is moving with a speed of $$7.2 \mathrm{~m} / \mathrm{s}$$ collides head-on and elastically with another ball initially at rest. Immediately after the collision, the incoming ball bounces backward with a speed of $$3.0$$ Part B $$\mathbf{m} / \mathrm{s}$$, Calculate the mass of the target ball. Express your answer to two significant figures and include the appropriate units.

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