Question 1 • POP Physics 26/27
Use the change in velocity over the stopping time to find the average acceleration: (0 − 4.4 m/s) ÷ 0.072 s ≈ −61 m/s². The average net force has magnitude m|a| = 0.150 kg × 61 m/s² ≈ 9.2 N, so the correct choice is 9.2 N.
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