How Do You Identify Forces Acting on an Object?

[alexas]

Consider the following tasks:

A. Draw a closed curve around the system.
B. Identify “the system” and “the environment.”
C. Draw a picture of the situation.

Which of these are steps used to identify the forces acting on an object?

A only
B only
C only
A, B, and C
None of themI was thinking A, B, and C? Am i correct?

 

[alexas]

I felt pretty positive with A, B, and C, and it turned out to be correct.