Here is the problem:
If an object changes in velocity from 50meters per second to 80meters per second in 15 seconds, then its average velocity during those 15 seconds is _______
Please explain the answer. I have gotten two different answers using different equations so Im not sure what I am supposed to use.
2006-09-27 13:51:55 · 4 answers · asked by ??? 2 in Science & Mathematics ➔ Physics
Is speed the same as velocity in this problem? because sometimes speed and velocity yield different answers.
2006-09-27 14:11:32 · update #1
avearage velocity is defined as total distance / total time.
acceleration is 2m/s.
total distance is 50*15+0.5*2*225=750+225=975
therefore average velocity is 975/15=65m/s.
2006-09-27 23:57:53 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Average speed of every 2 seconds is (80+50)/2=65
it means average speed of first 14 seconds is 65
and speed of 15th second is 50m/s
in first 14 second object travels 65*14=910m
and in 15th second obejct travels 50m
so object travel 910+50=960m in 15 seconds
it means the average of speed is 960/15=64m/s
2006-09-27 21:07:23 · answer #2 · answered by Mamad 3 · 0⤊ 0⤋
65 meters per second.
you should have made the question more difficult.
2006-09-27 20:58:55 · answer #3 · answered by Anonymous · 0⤊ 0⤋
I don't think you can compute that...
it's accelerating and you don't know the rate of acceleration
2006-09-27 20:56:56 · answer #4 · answered by Anonymous · 0⤊ 0⤋