In the Olympiad of 708 B. C. some athletes competing in the standing long jump used handheld weights called halteres to lengthen their jumps. The weights were swung up in front just before liftoff and then swung down and thrown backward during the flight. Suppose a modern 79 kg long jumper similarly uses two 4.50 kg halteres, throwing them horizontally to the rear at his maximum height such that their horizontal velocity is zero relative to the ground. Let his liftoff velocity be vvec = (9.5ihat + 4.0jhat) m/s with or without the halteres, and assume that he lands at the liftoff level. What distance would the use of the halteres add to his range?

0.441296016722 m

Explanation:

= Initial speed =

The magnitude of velocity is

Take of angle

Range without halters

In this system the momentum is conserved

Change in velocity is given by

Time taken is

Difference in range is given by

The difference in range is 0.441296016722 m

this is an example of "committed" time.

committed time, as contracted time, takes need over essential and available time since it is seen as profitable work. it alludes to the time allotted to keep up a home and family. at the point when a man is commuting using committed time this individual may feel that the drive is an obligation to family, for example, strolling youngsters to class or driving a mate to work. contracted and committed time clients may feel that their commute could really compare to the commute of important or leisure time clients on the grounds that their commute is profitable work. in this manner, they might be more disposed to pick a mechanized method of movement.