Solving Frictional Forces Homework

[nctweg]

Homework Statement

In the attachment

Homework Equations

F = ma
F = mg
F_friction < μ*N

3. Attempt at a Solution

Okay so I know that the weight is weighing down with a gravitational force of ~750 N. Similarly, I know that the two forces on the wall will both provide frictional forces pointing up with a magnitude equal to μ*F.

So I set (mg)/2 = μ*F and got something along the lines of 910 Newtons. I'm convinced this is correct because I can see no other way to do it. The book's answer is 52 Newtons which doesn't make sense because you'd have a combined force of 104 Newtons holding up a gravitational force of ~750 Newtons.

I'm looking for someone to either confirm that I'm doing it correct or point out what I'm doing wrong. Thanks.

 

[Chestermiller]

I get the same answer as you.

Chet