Posted by abbie on Monday, October 10, 2011 at 6:56am.
A car is traveling at a constant speed of 27.1 m/s on a highway. At the instant this car passes an entrance ramp, a second car enters the highway from the ramp. The second car starts from rest and has a constant acceleration. What acceleration must it maintain, so that the two cars meet for the first time at the next exit, which is 2.81 km away?

physics  drwls, Monday, October 10, 2011 at 8:43am
To travel 2.81 km, and reach the next exit at the same time, the time spent getting there must be
t = 2810/27.1 = 103.7 s.
Require that
(1/2) a t^2 = 27.1 t, and
solve for a, using the t from above.
a = 54.2/t = 0.523 m/s^2
Answer This Question
Related Questions
 physics  A car is traveling at a constant speed of 25.5 m/s on a highway. At ...
 phyics  A car is traveling at a constant speed of 31.8 m/s on a highway. At ...
 physics  A car sits in an entrance ramp to a freeway, waiting for a break in ...
 physics  A car accelerates at a constant rate of 3.42 m/s2 from rest at the ...
 Physics  A car sits in an entrance ramp to a freeway, waiting for a break in ...
 physics  Car a starts from rest and speeds up with constant accelleration until...
 Physics 12  A sports car is travelling along a highway at a constant velocity ...
 physics  a car starts from rest at constant acceleration of 2m/s2 at the same ...
 MATH  A truck enters a highway driving 60mph. A car enter the highway at the ...
 Physics . pls help me :)  Two train cars are on a straight, horizontal track. ...
More Related Questions