Accomplished ballet dancers and basketball players often appear to \"hang\" in t
ID: 1405991 • Letter: A
Question
Accomplished ballet dancers and basketball players often appear to "hang" in the air when jumping. About everyone has heard the expression "hang time". Does this really happen or is it just an illusion? One of the most accomplished leapers, Darrel Griffith, had a standing vertical jump of 4 ft that lasted a total of only 1 second.
Consider Darrel Griffith's 4 ft vertical leap and answer the following questions:
1. Does Darrel spend more time in the air while between 0 and 2 ft from the ground or while between 2 and 4 ft? Explain.
2. From the very beginning to the very end of his jump, does his head move through just 4 ft? Explain.
Explanation / Answer
1)
as the speed through initial 0 t 2 feet is more than the speed thorugh 2 to 4 feet
it will take longer time to go through the later 2 to 4 feet height
hence ,
Darrrel spends more time in air between 2 and 4 feet
2)
from the begining of the jump to the end of jump ,
head moves 4 feet while going up and another 4 fett while falling down from air