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Intrusionv2
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Homework Statement
A car travels east at 95 km/h for 1.5 hours. It then travels 30.0° east of north at 111 km/h for 1.8 hours.
What is the average velocity for the trip? (Magnitude and degrees)
Homework Equations
law of cosines/resultant
The Attempt at a Solution
I have tried doing this:
d=952 + 1112 - 2(85*111)cos60 = 110km
v=110km / 3.3 hr = 33.1 m/s
for the angle...
tanx = Bsinx/ a + bcosx = 111sin60/95+111cos60 = 0.638
x = 32.5 north of east
Both of these were wrong...any help please??
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