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two forces act on an object, force A id 8.7N and force B is 12.9N. The angle between the two forces is 125 degrees. what is the net force on the object?

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Fn = 8.7[125o] + 12.9[0o]

X = 8.7*Cos125 + 12.9 = 7.91 N.
Y = 8.7*sin125 = 7.13 N.

Fn = sqrt(X^2+Y^2) = sqrt(7.91^2*7.13^2)
= 10.65 N.

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