AP Physics 1hardmcq1 pt
A 1.0 kg ball on a 0.80 m string circles at 2.0 rad/s. Its angular momentum about the pivot is
A.1.3 kg·m²/s
B.1.6 kg·m²/s
C.0.64 kg·m²/s
D.2.6 kg·m²/s
Explanation
Core Concept
I = mr² = (1.0)(0.64) = 0.64 kg·m²; L = Iω = 0.64(2.0) = 1.28 ≈ 1.3 kg·m²/s.
Correct Answer
A1.3 kg·m²/s
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