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Physics 8 Online
OpenStudy (anonymous):

A bird flies 25.0 m in the direction 55° east of south to its nest. The bird then flies 75.0 m in the direction 55° west of north. What are the northward and westward components of the resultant displacement of the bird from its nest

OpenStudy (anonymous):

so this is similar to the last one so we have a bird

OpenStudy (anonymous):

we move 55 degrees east of south and 25m so we draw that

OpenStudy (anonymous):

|dw:1379787066996:dw|

OpenStudy (anonymous):

so we can see that we use the trig identities

OpenStudy (anonymous):

so for the eastward component we see we use sin since sin=opp/hyp

OpenStudy (anonymous):

so 25*sin55=opp

OpenStudy (anonymous):

with that we get the eastward component which is the same as the westward but we put a negative in front of our answer because an eastward component is heading away from west

OpenStudy (anonymous):

oh wait excuse me I did not see the second part

OpenStudy (anonymous):

so this would be easier to break into two parts

OpenStudy (anonymous):

we take the first drawing and break it into the components like explained earlier and then we do the same thing with the second drawing which would be

OpenStudy (anonymous):

|dw:1379787452639:dw|

OpenStudy (anonymous):

and then you add the components of the two triangles together and you get the components of your displacement

OpenStudy (anonymous):

thank you so much you r really smart

OpenStudy (anonymous):

|dw:1379788074991:dw|

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