two forces with magnitudes of 90 and 50 pounds act on an object at angles of 30 and 160, respectively. find the direction and magnitude of the resultant force.
\Magnitude of he two forces are
lb and
lb.
Two forces acting on an object at an angles of
and
.
Find the horizontal and vertical components of
.
Horizontal component of vector
is 
Vertcal components of vector
is
.
Therefore,
and
.
and 
Write the force
in vector form.

Substitute corresponding values.
\
.
Write the force
in vector form.

Substitute corresponding values.
\
.
Resultant force vector
.

.
Find the magnitude and direction of the resultant force
.
Magnitude of vector
is
.
Direction angle of the vector
is
.
Thus, 
.

Direction angle of the resultant vector is 
.

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