Question #4405

An object, that remains at rest, is acted upon by three forces F1, F2 and F3. The component forms of F1 and F2 are given by
F1 =ai + bj and F2 = ci + dj
where a = -116, b = 50, c = 129 and d = -195. If the component form of F3 is of the form
F3 = xi + yj
then what is the value of x?

Expert's answer

As objectremains at rest then

Fx=Fy=0

Then a*i*+b *i*+x *i *=0=-116 *i*+129 *i*+x *i* =13 *i*+x *i *=0 => x=-13

please note that*i *- vector

Fx=Fy=0

Then a

please note that

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