Energy and Momentum: Two simple pendulums of equal length l = 0.45 m are suspended from the same point. The pendulum bobs are small solid steel spheres. The first bob is drawn back to make a 35° angle with the vertical, while the other one is left hanging at rest. If the first bob has a mass of 0.25 kg and the second has a mass of 0.54 kg, how high will the second bob rise above its initial position when struck elastically by the first bob after it is released?
A. 3.3 cm
B. 2.7 cm
C. 3.9 cm
D. 4.4 cm
Answer: A
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