- #1
hiineko
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Homework Statement
You drive on Interstate 10 from San Antonio to Houston, half the time at 58 km/h and the other half at 103 km/h. On the way back you travel half the distance at 58 km/h and the other half at 103 km/h. What is your average speed (a) from San Antonio to Houston, (b) from Houston back to San Antonio, and (c) for the entire trip? (d) What is your average velocity for the entire trip?
Homework Equations
V=d/t[/B]
The Attempt at a Solution
with a help of a friend online but I still don't understand it.
a.) (58*t/2 + 103*t/2) / t = 58/2+103/2 = (58+103)/2 = 80.5 The problem is I don't know how did "t" gone
b.) D/(D/2/(58))+(D/2/(103)) = ??
c.) none, stuck in A and B so can't answer this
d.) I don't why "zero" is the answer here pls explain
Help pls
I kinda suck at Algebra which lead to sucking in Physics too lol
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