Moment x Moment?
Moment x Moment?
(OP)
|
5' \|/ 2.4K
___________
M1 |
|
|
| 12'
|
|
|
|
M2__|__
I have a 2.4K point load at the end of the cantilever which produces a 12.0 k*ft moment at top of column.
Do I then determine M2 to equal 12 k*ft x 12 ft = 144 k*ft^2? This does not seem right to me. I am expecting a typical k*ft moment at the base. What am I doing wrong?
5' \|/ 2.4K
___________
M1 |
|
|
| 12'
|
|
|
|
M2__|__
I have a 2.4K point load at the end of the cantilever which produces a 12.0 k*ft moment at top of column.
Do I then determine M2 to equal 12 k*ft x 12 ft = 144 k*ft^2? This does not seem right to me. I am expecting a typical k*ft moment at the base. What am I doing wrong?






RE: Moment x Moment?
RE: Moment x Moment?
divide the structure into free bodies, the cantilever is one and the column the other
good luck
RE: Moment x Moment?
where F= force
d=perpendicular distance from the point under consideration to the line of action of the force.
In your case,
d=5', F=2.4kips
M=5x2.4=12 k-ft.
When considering moments about the base of your column, you're not using the proper moment arm. Your moment arm should be perpendicular to the line of action of your force. Your correct moment arm is 5 feet. Since a bending moment is a force times a distance, the units on a bending moment should be force and length, not force and length squared. A good book on statics will go into more detail.
RE: Moment x Moment?
RE: Moment x Moment?
Regards,
-Mike