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.
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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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