Chapter Three (Three Body Diagrams)

Question 1

With free-body diagrams in mind, what does equilibrium mean?

Answer 1

the forces acting on the object are zero

Question 2

What are the first three steps to a free-body diagram?

Answer 2

1. Isolate particles from the surroundings
2. Show all the forces that act on the particle
3. Identify all known magnitudes and directions acting on the particle

Question 3

When breaking down the particle we can assume the total forces to be equal to what value?

Answer 3

0, as it is in equilibrium

Question 4

How many unknowns are able to be solved in a 2D free-body diagram?

Answer 4

2 Unknowns in a 2D

Question 5

What are all the steps to 2D Free Body Diagrams?

Answer 5

1. Understand all components of the situation
2. Break down into equations
3. Isolate for specific variables and substitute back to solve for others

Question 6

How many unknowns can be solved with a 3D free body diagram, and why can you solve for this amount of forces?

Answer 6

You can solve for three forces because: