Question 350545: A car travels at 60 mph east for 20 min then at 30 mph north for 30 min. What is the average speed and average velocity? Answer by Fombitz(32388) (Show Source):
You can put this solution on YOUR website! Rate*Time=Distance
Find the total distance traveled. miles East miles North miles
Find the total time elapsed, hr
Average speed is distance traveled divided by time elapsed. mph
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Average velocity is the change in the position vector divided by elapsed time.
(,) is the starting point.
East is positive .
North is positive .
Determine the final position.
(,)+(,)+(,)=(,)
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The magnitude of the position vector is miles
Divide by elapsed time, mph
The direction is given by where theta is the angle measured CCW from the x-axis. degrees
The velocity vector has magnitude mph and angle of degrees or in vector coordinates (,) mph.
