alleryA 0.5 kg ball hits a wall at 10 m/s and rebounds at 10 m/s. The impulse on the ball is
A0
B10 kg·m/s
C20 kg·m/s
D5 kg·m/s
Answer & Solution
Correct answer: B. 10 kg·m/s
Δp = m(v−u) = 0.5·(−10−10) = −10 kg·m/s; magnitude 10 kg·m/s.
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