2007-02-27 02:23:38 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Physics
Estimate the amount of force that one person can sustain for ten hours of work. (Think about the weight of a hiker's backpack.) Using this value, how many people does it take to pull a block at constant velocity.
2007-02-27 02:24:22 · update #1
Are you sure this is all you've got?
2007-02-27 02:30:46 · answer #1 · answered by supersonic332003 7 · 0⤊ 0⤋
Any work done along the horizontal direction is zero.
Force x cos 90 degrees = 0 = Work
Therefore the amount of force that one person can sustain for 10 hours depends upon the direction of the work done. Be it a hiker or any horizontal worker, it always depends upon the direction and not the number of persons as potential energies !
2007-02-27 10:39:05 · answer #2 · answered by Anonymous · 0⤊ 0⤋
the situation involves knowledge of biology,about muscle faigue etc
2007-02-27 10:38:03 · answer #3 · answered by ukmudgal 6 · 0⤊ 0⤋
did you get droped on the head?
2007-02-27 10:31:21 · answer #4 · answered by HEY HOW ARE YA 3 · 0⤊ 0⤋