Engineering Board Exam Reviewer · Physics · hard
A 20 g bullet moving at 300 m/s embeds itself in a 2 kg wooden block hanging as a ballistic pendulum. How high does the block rise? (g = 9.81 m/s2)
- 458.72 cm
- 45.87 cm
- 44.97 cm
- 89.94 cm
Answer
C. 44.97 cm
Solution
Momentum: V = 0.02(300)/2.02 = 2.9703 m/s. Energy: h = V2/(2g) = 0.44968 m = 44.97 cm.
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