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?
Question #1: 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?
Question #2: 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?
Question #3: Two 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?
Question #4: 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?
Question#5:A baseball pitcher throws a 144 g baseball at a velocity of 47 m/s towards home plate. The batter hits the ball, and the velocity of the ball coming off the bat is 57 m/s in the opposite direction of the velocity of the pitch. The bat is in contact with the ball for 0.003 seconds. What is the magnitude in Newtons of the average force applied to the ball?
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