- #1
smashd
- 10
- 1
Homework Statement
A diving board of length L is supported at a point a distance x from the end, and a diver weighing w1 stands at the free end (Figure 1) . The diving board is of uniform cross section and weighs w2.
(Figure 1)
- Find the force at the support point.
- Find the force at the end that is held down.
Homework Equations
[itex]\sum\tau_{z} = 0[/itex]
[itex]\sum F_{x} = 0[/itex]
[itex]\sum F_{y} = 0[/itex]
The Attempt at a Solution
So first I found the x & y components of the forces on the diving board. Oh, I also defined n2 as the normal force on the left end of the board, and n1 as the normal force at the support point. Up is positive and down is negative.
[itex]\sum F_{x} = 0[/itex]
[itex]\sum F_{y} = 0 = n_{1} - n_{2} - w_{1} - w_{2}[/itex]
Now to take the torque about an axis, since I have a lot of unknowns here. Here I've chosen the left normal force as the axis of rotation. Counter-clockwise is positive and clockwise is negative.
[itex]\sum\tau_{n_{2}} = 0 = n_{1}(L - x) - w_{2}(\frac{L}{2}) - w_{1}(L)[/itex]
Now I'm stuck and can't solve the two problems. I have a lot of unknowns and no other equations in my toolbox afaik. Help please!
Last edited: