AP Physics 1mediummcq1 pt
A 2.0 kg mass on a 1.0 m string is whirled so its angular momentum is 8.0 kg·m²/s. Its speed is
A.4.0 m/s
B.8.0 m/s
C.2.0 m/s
D.16 m/s
Explanation
Core Concept
L = mvr, so v = L/(mr) = 8.0/((2.0)(1.0)) = 4.0 m/s.
Correct Answer
A4.0 m/s
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