A car acceleration from rest with a constant acceleration of 2 m/s^2 onto a highway where traffict is moving at a steady 24 m/s. (a). How long will it take for the car to reach a velocity of 24 m/s?
(b). How far will it travel in that time ?
(c). the driver does not want tje vehicle behind to come closer than 20 m nor force it to slow down. how large a break in traffic must the driver wait for?
(b). How far will it travel in that time ?
(c). the driver does not want tje vehicle behind to come closer than 20 m nor force it to slow down. how large a break in traffic must the driver wait for?
Verified answer
Diket :kecepatan away, Vo = 0
percepatan kontsan, a = 2 m/s²
kecepatan akhir, V = 24 m/s
Tanya :
A. Waktu tempuh saat V = 24 m/s, t = ___ ?
B. Jarak tempuh, s = __?
C. besar lama kemacetan pada jarak 20 m, t = __?
Jawab :
A. Gunakan GLBB Tanpa jarak,
V = Vo + a.t
24 = 0 + 2.t
24 = 2.t
t = 12 detik
B. Gunakan GLBB :,
S = Vo.t + 1/2.a.t²
S = 0 + 1/2. 2. 12²
S = 144 m
C. Gunakan GLBB Tanpa perlambatan, saat jarak, s = 20 m
s = (Vo + V)/2. t
20 = (0 + 24)/2. t
20 = 12.t
t = 20/12
t = 5/3 detik
___________________
)|(
FZA