Physics Fundamentals
2nd Edition
ISBN: 9780971313453
Author: Vincent P. Coletta
Publisher: PHYSICS CURRICULUM+INSTRUCT.INC.
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Chapter 1, Problem 56P
To determine
The time taken by the runner behind the winner.
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A turtle and a rabbit engage in a footrace over a distance of 4km. The rabbit runs 0.5km and then stops for a 90-min nap. Upon awakening, he remembers the race and runs twice as fast. Finishing the course in a total time of 1.75h, the rabbit wins the race. Calculate the average speed of the rabbit
In 1987, Art Boileau won the Los Angeles Marathon, 26 mi and 385 yds, in 2 h, 13 min, and 9 s. At the 21- mi marker, Boileau had a 2.50-min. lead on the second place winner, who later crossed the finish line 30 s after Boileau. Assume that Boileau maintained one constant average speed during the race and that both runners had been running at the same speed when Boileau passed the 21-mi marker. Find the average acceleration (in m/s²) that the second place contestant had during the remaining part of the race after Boileau passed the 21-mi marker. (1 mile is 5280 feet, 1 yard is 3 feet, 1 foot is 12 inches, and 1 inch is 2.54 cm, or 0.0254 m) ANS: 5.86x10^-4 m/s^2
In 1987, Art Boileau won the Los Angeles Marathon, 26 mi and 385 yds, in 2 h, 13 min, and 9 s. At the 21- mi marker, Boileau had a 2.50-min. lead on the second place winner, who later crossed the finish line 30 s after Boileau. Assume that Boileau maintained one constant average speed during the race and that both runners had been running at the same speed when Boileau passed the 21-mi marker. Find the average acceleration (in m/s²) that the second place contestant had during the remaining part of the race after Boileau passed the 21-mi marker. (1 mile is 5280 feet, 1 yard is 3 feet, 1 foot is 12 inches, and 1 inch is 2.54 cm, or 0.0254 m)
Chapter 1 Solutions
Physics Fundamentals
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