Physics101
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Starting with an initial speed of 4.21 m/s at a height of 0.387 m, a 1.05-kg ball swings downward and strikes a 5.17-kg ball that is at rest, as the drawing shows. (a) Using the principle of conservation of mechanical energy, find the speed of the 1.05-kg ball just before impact. (b) Assuming that the collision is elastic, find the velocity (magnitude and direction) of the 1.05-kg ball just after the collision. (c) Assuming that the collision is elastic, find the velocity (magnitude and direction) of the 5.17-kg ball just after the collision. (d) How high does the 1.05-kg ball swing after the collision, ignoring air resistance? (e) How high does the 5.17-kg ball swing after the collision, ignoring air resistance?