Saved Bookmarks
| 1. |
S athlete Florence Griffith-Joyner won the 100 msprint gold medal at Seol Olympic 1988 setting a newOlympic record of 10-54 s. Assume that she achieved hermaximum speed in a very short-time and then ran therace with that speed till she crossed the line. Take hermass to be 50 kg. Calculate the kinetic energy ofGriffith-Joyner at her full speed. bAssuming that thetrack, the wind etc. offered an average resistance of onetenth of her weight, calculate the work done by theresistance during the run. (c) What power GriffithJoyner had to exert to maintain uniform speed ? |
| Answer» | |