"ut omnes discant quod erat demonstrandum"

 

Mastered each JEDI Trial!
Emma Cochran
Damon Drury
Lukas Zerajic
Board Battles Theme Song!
© Peter Weihs & Colby Knight 2013
 
Bookmark this website on the home screen of your mobile device. Don't know how? Watch here!
 

Inquiry: Boom/Chain Problems

Purpose: To examine and calculate boom/chain problems.

Procedure:

  • To begin make sure the boom is at a 90 degree angle with the upright support.

  • A pulley will be attached to the middle of the boom to give the boom more weight.

  • Draw the FBD. ( boom=94.3 g, pulley=101.7g, mass=1000g)

  • Calculate all remaining forces on the FBD.

  • Measure the chain force and the force acting ALONG the boom.

  • Compute % errors. Your calculated values will be the theoretical values.

  • Repeat the experiment but change the angle from 90 degrees.

  • Boom Chain problems are greatly simplified if we assume the mass of the boom is negligible and the only mass is on the end.

Inquiry Questions:

1.) A boom/chain is setup as shown below:

a.) What is the tension force in the chain?

b.) What is the force by the wall acting on the boom and at what angle is it working with respect to straight down the boom?

2.) A boom/chain is setup as seen below:

a.) What is the tension force in the chain?

b.) What is the force by the wall acting on the boom and at what angle is it working with respect to straight down the boom?

3.) The wrecking ball below has a weight of 4800 N and the uniform boom weighs 3600 N.

a.) Calculate the tension in the support cable?

b.) What is the magnitude of the force exerted on the lower end of the boom by the hinge at point P and what is the direction with respect to directly down the boom?