On two occasions you accelerate uniformly from rest along an on-ramp in order to merge into interstate traffic at 65 mi/h. On-ramp A is 200 m long and on-ramp B is 400 m long.
(a) Is your acceleration along on-ramp A greater than, less than, or equal to your acceleration along ramp B?
(b) Choose the best explanation from among the following:
I. The shorter acceleration distance on ramp A requires a greater acceleration.
II. In each case, you start from rest and have the same final speed.
III. The greater distance traveled on ramp B requires a greater acceleration.