Newton's Second Law in 1 Dimension: Calculate the average force a bumper would have to exert to bring a 1200-kg car to rest in 15 cm when the car had an initial speed of 2.0 m/s (about 4.5 mph).
A. 1.8 × 104 N
B. 1.6 × 104 N
C. 5.4 × 104 N
D. 6.5 × 105 N
E. 3.2 × 104 N
Answer: B
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