Aperson carries a plank of wood 2.00 m long with one hand pushing down on it at one end with a force f1 and the other hand holding it up at .500 m from the end of the plank with force f2 . if the plank has a mass of 20.0 kg and its center of gravity is at the middle of the plank, what is the magnitude of the force f1?

Explanation:

Given:

For the plank to be in equilibrium the total sum of total forces & moments (about any point) must be zero:

&

We take the sum of forces:

.............................................(1)

Take moment about the extreme right:

Now, put this value in eq. (1)

i think if it were me i whould divide 300 dide 15

step-by-step explanation:

the total distance that martina travels that day is

(distance from home to mom's office) plus (distance from mom's office to school)

plus (distance from school to library) plus (distance from library to friend's house)

plus (distance from friend's house to martina's house).

(we don't know what any of these distance actually is.)