What is the angle between the direction of the wind force and the direction of the boat's motion during this time interval? angle:

University Physics Volume 1
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Chapter7: Work And Kinetic Energy
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Problem 100CP: The surface of the preceding problem is modified so that the coefficient of kinetic friction is...
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I cant figure out how to find the angle

A small boat is crossing a lake on a windy day. During some interval of time, the boat undergoes the given displacement Ar.
Ař = (3.29 m) î + (2.91 m)ĵ
During the same interval of time, the wind exerts the given constant force F on the boat.
F = (265 N) î – (121 N)ĵ
What is the total work done on the boat by the wind over this period of time?
work:
519.74
J
What is the angle between the direction of the wind force and the direction of the boat's motion during this time interval?
angle:
Transcribed Image Text:A small boat is crossing a lake on a windy day. During some interval of time, the boat undergoes the given displacement Ar. Ař = (3.29 m) î + (2.91 m)ĵ During the same interval of time, the wind exerts the given constant force F on the boat. F = (265 N) î – (121 N)ĵ What is the total work done on the boat by the wind over this period of time? work: 519.74 J What is the angle between the direction of the wind force and the direction of the boat's motion during this time interval? angle:
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