course Phy 201
An automobile traveling a straight line is at point A at clock time t = 4 sec, where it is traveling at 10 m/s, to point B at
clock time t = 11 sec, where it is traveling at 20.5 m/s. Point A is 75 meters from the starting point and point B is 115
meters from the starting point. What are the average velocity and the average acceleration of the automobile during the
specified time? What evidence is there that the acceleration is or is not uniform?
First we find the vAve. by taking (20.5m/s+10m/s)/2
vAve=15.25
Second is aAve.by dividing `ds by the `dt
(20.5m/s-10.0m/s)/(11s-4s)=
aAve=1.5m/s^2
Yes it does have uniform acc.because the intial,average, and final velocites are equally spaced during the time interval.
What I dont understand is that if you have different of 40m between points a and b(115m-75m), but when you take vAve. * `dt you come up with 106.4m so does this mean the acceleration is not uniform or is this some numbers you threw out there?
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