Here is the problem: Jessica is riding her bike along Ross Road. With the bike, she has a mass of 90 kg and is going along at 8 m/s when a deer runs out in front of her. She slams on the brakes and manages to stop the bike in 3.2 seconds. How much net force did Jessica exert on the bike? In what direction did the net force act? What was the accleration of the bike? How far did she go before stopping?
2006-10-11 16:23:16 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Physics
F = ma
a = v/t = 8/3.2 m/s^2 = 2.5 m/s^2
m = 90 kg
F = 90*2.5 = 225 kg m/s^2
2006-10-11 16:32:48 · answer #1 · answered by spongeworthy_us 6 · 0⤊ 0⤋
to devise what amount of force Jessica exerted on the bike it would be important to know the gear ratio, the ratio of jessicas wieght to the bike, the bike was traveling with a force fo f=ma
so f= 90 * 8
f= 720
hope this helps
2006-10-11 16:42:37 · answer #2 · answered by Grev 4 · 0⤊ 1⤋