florence griffith set two world records in 1988. the first was set for the womens 100 m run, which she ran in 10.49 s with an average speed of 9.53 m/s. the second record was set in the womens 200 m run which griffith ran in 21.34 seconds with an average speed of 9.37 m/s. calculate the ratio of kinetic energies for each run
2006-12-03 06:05:24 · 3 answers · asked by socom_lover 2 in Science & Mathematics ➔ Physics
9.53^2 : 9.57^2
(assuming her mass is constant both times)
2006-12-03 06:13:07 · answer #1 · answered by SS4 7 · 0⤊ 0⤋
Negating air resistance,
ke1 = .5*m*9.53^2
ke2 = .5*m*9.37^2
ke1/ke2 = 1.0344
that's assuming she didn't gain any weight in between runs lol
2006-12-03 14:13:51 · answer #2 · answered by MooseBoys 6 · 0⤊ 0⤋
KE is proportional to the square of the velocity
2006-12-03 14:13:37 · answer #3 · answered by arbiter007 6 · 0⤊ 0⤋