(adsbygoogle = window.adsbygoogle || []).push({}); 1. A car sits on a freeway entrance ramp waiting for a break in traffic. The driver sees a gap and accelerates onto the freeway. Thar car starts from rest and moves in a straight line and has a speed of 20m/s when it reaches the end of the 120 m long ramp. Find A] acceleration of the car. B] How much time does it take the car to drive the entire length of the ramp?

2. EQNs of constant acceleration

Vx=Vox+AxT

X=Xo+VoxT+1/2AxT

Vx2=Vox2+2Ax(X-Xo)

X-Xo=((Vox+Vx)/2)T

3. I cannot find the acceleration if I do not know the time it took to get to the end point. I am also stuck on the idea that if you have constant velocity you must have constant acceleration. But, arent external forces always slowing you down, so to maintain constant velocity you would always need to be accelerating?

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Constant Acceleration problem

**Physics Forums | Science Articles, Homework Help, Discussion**