Week7_1 - ENGR210, Fall 2011 Example 1 ENGR210, Fall 2011 2...

Info iconThis preview shows pages 1–8. Sign up to view the full content.

View Full Document Right Arrow Icon
ENGR210, Fall 2011 1 Example
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
ENGR210, Fall 2011 2
Background image of page 2
ENGR210, Fall 2011 3
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
ENGR210, Fall 2011 4 EXAMPLE 5.16
Background image of page 4
ENGR210, Fall 2011 5 SOLUTION The FBD of each body (cord and pulley) looks like (The coordinates are not shown) However, we know that there is no friction between the pulley and the cord, and so T=100 lb. Also, the pressure distribution is not easy to determine. Therefore, we do not separate the system into subsystems for this problem, and the FBD is below.
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
ENGR210, Fall 2011 6 By combining the two systems (or by not dividing into subsystems), the internal forces (pressure p in this case) would not appear. This is convenient because we are not interested in p in this problem. (If you want to know internal forces, you must separate bodies to “ expose ” the internal forces as external forces .) The solutions are in the textbook. (There are 3 unknowns and 3 equations. Take the moment about A).
Background image of page 6
ENGR210, Fall 2011 7 Notice that there should be no more than 3 unknowns in a 2D system (each body) to uniquely determine the unknowns, because
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 8
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 19

Week7_1 - ENGR210, Fall 2011 Example 1 ENGR210, Fall 2011 2...

This preview shows document pages 1 - 8. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online