AP Physics 1hardmcq1 pt
A 0.40 kg block on a spring (k = 250 N/m) is released from rest with the spring compressed 0.20 m. Its maximum speed is
A.5.0 m/s
B.25 m/s
C.2.5 m/s
D.10 m/s
Explanation
Core Concept
½kx² = ½mv² gives v = √(kx²/m) = √((250)(0.04)/0.40) = √25 = 5.0 m/s.
Correct Answer
A5.0 m/s
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