5. In 1990, the women's record in bicycling was set by a Russian athlete. Starting at a certain speed, the bicyclist traveled 2 x 10^2 m. Suppose the initial velocity was 12 m/s and the acceleration was constant. If the final velocity was 25 m/s, what was the acceleration? How long did it take to travel this distance?
2007-09-22 13:19:18 · 1 answers · asked by KatieLC91 1 in Science & Mathematics ➔ Physics
I trust that you were given 4 formulas to use on problems like these. Look at the info you were given and what you need to find. Then look at what data is involved in the 4 formulas. One of the equations should put the known data to work and give you what you need.
You know initial and final velocity and the distance traveled. So to find the acceleration, use
Vf^2 = Vi^2 + 2*a*d
To find the time, use
Vf = Vi + a*t
or
d = (Vf + Vi)*t / 2
2007-09-22 15:32:25 · answer #1 · answered by sojsail 7 · 0⤊ 0⤋