Physics

Problem

5.0\,\text{g}

pellet is fired horizontally into a

1.0\,\text{kg}

wooden block suspended from two light strings so that it can swing like a pendulum. The pellet embeds in the block, and the combined system subsequently rises to a vertical height of

0.040\,\text{m}

before momentarily coming to rest. What was the speed of the pellet just before impact? a)

222\,\text{m/s}

89\,\text{m/s}

178\,\text{m/s}

126\,\text{m/s}

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