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OpenStudy (anonymous):
Lauren is pulling on a trunk with a 15-N force. Wayne pulls at right angles to Lauren. With how much force must Wayne pull to make the resultant force on the trunk 22 N? Round answer to one decimal place.
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OpenStudy (anonymous):
options are: . 26.6 N B. 21.4 N C. 18.7 N D. 16.1 N E. 17.4 N
OpenStudy (mathmate):
forces are at 90 degrees, so resultant can be calculated by Pythagoras theorem. L=15 W=Wayne's pulling force Resultant = sqrt(L^2+W^2)=22 Solve to get W=sqrt(22^2-15^2)
OpenStudy (anonymous):
so its 16.1?
OpenStudy (mathmate):
Correct!
OpenStudy (anonymous):
Thank you!
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OpenStudy (mathmate):
You're welcome!
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