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Deciding what Angle to use....HELP PLEASE !!

jmcpherson82

Entry posted by jmcpherson82

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The question is this:

A hiker sets out on a trek heading (N35degreesE) at a place of 5.0 km/h for 48.0 mins. He then heads west at 4.5 km/h for 40.0 min. Finally, he heads (N30degreesW) for 6.0 km, until he reaches a campground 1.5 hours later.

A) Find his total displacement using vector components.

SO, i used Ax = 4.0 cos 35degrees = 3.27

Ay = 4.0 sin 35degrees = 2.29

Then I looked at the answers and it said I should have used the angle 55 degree angle instead of the 35. How do I figure out when to use which angle?

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