Example Question

A beam is loaded with the forces and moment shown. Superman claims he can replicate the loading with just one finger. Where along x should superman place his finger, and what is the magnitude of the force he should apply?

Click below to show answer. X

Step 1:
Calculate resultant force

Step 1:
Calculate resultant force

Step 2:
Calculate net moment

Step 2:
Calculate net moment

Step 3:
Determine position x of resultant force to produce net moment

Step 3:
Determine position x of resultant force to produce net moment

Useful formula:

Useful formula:

Now that you've mastered this question, you can try Question 1.

Example Question

Example Question

Step 1: Calculate resultant force Step 1: Calculate resultant force

Step 2: Calculate net moment Step 2: Calculate net moment

Step 3: Determine position x of resultant force to produce net moment Step 3: Determine position x of resultant force to produce net moment

Useful formula: Useful formula:

Step 1:
Calculate resultant force

Step 1:
Calculate resultant force

Step 2:
Calculate net moment

Step 2:
Calculate net moment

Step 3:
Determine position x of resultant force to produce net moment

Step 3:
Determine position x of resultant force to produce net moment

Useful formula:

Useful formula: