A unicorn running on a beach at 7 m/s changes speed at a constant rate of 3.6 m/s2 over a period of 3 seconds. What distance did the unicorn travel during this process? Correct Answer: 37.2 A 60-kg woman in an elevator is accelerating downward at a rate of 1.2 m/s2. What is the magnitude of the force exerted by the elevator floor on the woman’s feet? Correct Answer: 516Two people play tug of war. The 100-kg person on the left pulls with 1,200 N, and the 70-kg person on the right pulls with 800 N. Assume that neither person releases their grip on the rope with either hand at any time, assume that the rope is always taut, and assume that the rope does not stretch. What is the magnitude of the tension in the rope in Newtons? Correct Answer: 964.7 ± 1%A man pulls a 14-kg sled 44 meters along an angled hill with a force of 95 N, which elevates the man 30 meters above the bottom of the hill. The man then hops on his sled and slides to the bottom of the hill back along his 44 meter path, during which a 296 N frictional force acts upon his sled. How much work in Joules does the man do against friction in pulling the sled up the hill? Correct Answer: 64.00 ± 5%
Magnitude of tension in rope
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