course phy121
How far does an object travel and what is its acceleration if its velocity increases at a uniform rate from 9 m/s to 24 m/s in 9 seconds?`ds = vAve * `dt
`ds = 16.5m/s * 9sec
`ds = 148.5m
a = `dV / `dt
a = ( 24m/s - 9m/s ) / 9sec
a = ( 15m/s ) / 9sec
a = 1.667m/s/s
Explain the meaning of the slope and area of the velocity vs. time for this object during this time interval.
The slope of the line is equal to the acceleration of the object when its velocitys are graphed.
The area of the trapezoid between any two points on the line is equal to the distance traveled during the time interval selected.
Your two answers consist of correct statements, but do not include any explanation. On such a question you need to explain why you answer as you do.
If you are not completely sure you could explain your answers, then you should insert and properly mark your best explanations and submit a copy. However I suspect that you do completely understand this so it is probably not necessary for you to do so.