physics vector problem..help

1.Two forces Pand Q have a resultant force R with a maximum value of 60N and a minimum value of 10N.Find R if the angle between Pand Q is 40.

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2025-01-09 16:53广告

x+y=60
x-y=10
sqrt(x^2+y^2+2*x*y*cos60)=?

It is about force moment

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