Derivation for the impulse and momentum formula for a system of particles. Notice that if the sum of external forces = 0 then momentum in the system is conserved!

Conservation of Momentum example 1

For method of sections: 1) Draw a free body diagram of the entire structure. 2) Choose your section wisely (make sure the variables you want are part of section you've chosen). 3) Solve using static equilibrium equations (sum of forces =...

This video shows how to calculate the internal forces of members that make up a truss. 1) Isolate the joint of interest. 2) draw a free body diagram 3) Apply sum of forces = 0 keeping in mind that some forces may be in BOTH x and y...

Now that we have learned about conservation of momentum, let’s apply what we have learned to an “explosion”. Okay, it’s really just the nerd-a-pult launching a ball while on momentum carts.

Shear and Bending are internal forces and moments that can be calculated by making cut sections along different sections of a beam. In general, the shear force and bending moment can vary along the length of the beam x, which is why we...

For method joints the usual method is

1) Find all necessary angles and geo
metry
2) Find all react
ion forces
3) Draw a FBD of a joint and

analyze forces

This truss problem looks difficult, but if you choose your...

Method of joints involves analyzing a free body diagram of an isolated joint and applying the sum of forces = 0.



Step 1: Draw FBD of w
hole truss
Step 2: Find
reaction forces
Step 3: Choose a joint to analyze and...

Method of sections is a technique used to find the internal forces in a truss. Draw a FBD of a section of the truss and make cut sections though the members that you wish to analyze. Apply equilibrium equations (sum of forces and sum of...

It’s no surprise that forces are everywhere! But how do we work out which forces are important, and which ones can be ignored? This lesson will distinguish between external and internal forces, before diving into more examples of contact...

F=ma for rigid bodies proof

Demonstrations of and Introduction to Conservation of Momentum

This nugget explains about the surface tension and its formation