An 1800-kg car starting from rest accelerates constantly during the first 9.5 s of its motion. If the force accting on the car is 2150 N, what is the car's speed at the end of its time.
2006-10-03 11:51:59 · 4 answers · asked by Bao Wow 3 in Education & Reference ➔ Homework Help
F = M * A, so A = F / M, so the acceleration is 2150 / 1800 meters per second. After 9.5 seconds it's speed will be 9.5 * 2150 / 1800 = 11.3472222 meters per second.
2006-10-03 12:01:27 · answer #1 · answered by kimmyisahotbabe 5 · 1⤊ 0⤋
Final Velocity = Acceleration * Time
Force = Mass* accel., so Accel = force/mass
so final velocity= (force/mass) * time
(2150 N / 1800 kg ) * 9.5s = 11.3472 m/s
2006-10-03 19:07:49 · answer #2 · answered by Anonymous · 0⤊ 1⤋
Remember that F = ma and a = (v2 - v1)/t. You have numbers for F and m in the first equation, so you can solve for a. Then use that value for a in the second equation, 0 for v1, and 9.5 for t, and you can solve for v2, the final velocity.
2006-10-03 19:00:53 · answer #3 · answered by tlf 3 · 0⤊ 1⤋
Trick question: you can't get a car to accelerate constantly. you'd have to know the outside atmospheric readings as well.
2006-10-03 18:56:25 · answer #4 · answered by ScubaGuy 3 · 0⤊ 1⤋