A car sits in an entrance ramp to a freeway, waiting for a break in the traffic. The driver sees a small gap between a van and an 18-wheel truck and accelerates with constant acceleration along the ramp and onto the freeway. The car starts from rest, moves in a straight line, and has a speed of 10 m/s (22 mi/h) when it reaches the end of the 115 m long ramp.
(a) What is the acceleration of the car?
m/s2
(b) How much time does it take the car to travel the length of the ramp?
seconds
(c) The traffic on the freeway is moving at a constant speed of 10 m/s. What distance does the traffic travel while the car is moving the length of the ramp?
meters
2007-09-10 09:33:30 · 1 answers · asked by Walachka 3 in Science & Mathematics ➔ Physics
The equations for this are
115=.5*a*t^2
10=a*t
Plug 10=a*t into the first equation and solve for t
115=5*t
t=115/5
t=23
a=12/23
the traffic moves 230 m
j
2007-09-10 21:56:48 · answer #1 · answered by odu83 7 · 0⤊ 0⤋