AP Physics 1mediummcq1 pt
A 0.5 kg ball moving at 10 m/s hits a wall and bounces back at 6 m/s. What is the change in momentum?
A.2 kg·m/s
B.5 kg·m/s
C.8 kg·m/s
D.3 kg·m/s
Explanation
Core Concept
Initial momentum = 0.5(10) = 5 kg·m/s (positive). Final momentum = 0.5(-6) = -3 kg·m/s. Change = -3 - 5 = -8 kg·m/s (magnitude: 8).
Correct Answer
C8 kg·m/s
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