# Homework Help: Deflection of cantilever

1. Aug 13, 2016

1. The problem statement, all variables and given/known data
in the notes , i dont understand the circled part . I dont understand why the circled part moment M is in anticlockwise direction ... Shouldnt it be in clockwise direction ?

2. Relevant equations

3. The attempt at a solution
As we can see , the P at the one end will cause the cantilever to bend in clockwise direction . So , i think that the direction of moment M is wrong ...
It should point in clockwise dircetion , which means M = -P(∂ -y) , am i right ?

#### Attached Files:

• ###### 356.jpg
File size:
36.9 KB
Views:
77
2. Aug 13, 2016

### PhanthomJay

The sketch shows the internal force and moment at the cut section, required for equilibrium. Applied moment is clockwise, so internal moment is ccw. Applied force P is downward, so internal force P is upward.

3. Aug 14, 2016

ok, can you look at the example below, why the circled moment M is same direction with the moment due to applied force P?
since they are in the same direction,how can they are in equilibrium?

#### Attached Files:

File size:
31.5 KB
Views:
63
• ###### 360.jpg
File size:
16.6 KB
Views:
62
4. Aug 14, 2016