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stephmaep
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Homework Statement
Darryl drives his load of tomatoes 14.0 km [E], 6.0 km [N], 12.0 km [ N 15° E], and then 2.0 km [N 65° E]. This takes him 42 minutes. Calculate Darryl's distance and displacement.
a) Calculate Darryl's distance and displacement. Draw a diagram and show your work.
b) Calculate Darryl's average speed and average velocity (record your answer in m/s).
Homework Equations
tan∅=opposite/adjacent
C^2 = a^2 + b^2
c(squared)=a(squared) +b(squared)=2abcos∅
The Attempt at a Solution
so I've tried drawing this and it seems that i have 2 triangles. so i tried to solve for Δd on the first triangle using the cosine law. to get the angle i used Tan
tan∅=6km/14km=23°
c(squared)=a(squared) +b(squared)=2abcos∅
= 6(squared)+14(squared)-2(6)(14)cos23°
=8.7km
[second triangle]
tan∅=2km/12km = 9.4°
c(squared)=a(squared) +b(squared)=2abcos∅
=2(squared)+12(squared)-2(12)(2)cos9°
=100.5km
so then i figured add them together and my Δd = 109.2 km
now honestly this just doesn't seem right to me at all I'm not sure how i should be approaching this but I'm getting really flustered cause I'm completely stumped by vectors right now and it's starting to turn me away from physics.
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