Machinedesign 2125 Hairy Houdinis 0 0
Machinedesign 2125 Hairy Houdinis 0 0
Machinedesign 2125 Hairy Houdinis 0 0
Machinedesign 2125 Hairy Houdinis 0 0
Machinedesign 2125 Hairy Houdinis 0 0

Fun with Fundamentals: Problem 242

Jan. 1, 2001
In his heyday, Melvin the Magnificent traveled the vaudeville circuit performing his renowned magic act

Problem 242: Hairy Houdinis
There’s no business like monkey business.

In his heyday, Melvin the Magnificent traveled the vaudeville circuit performing his renowned magic act. From a sequined top hat to illustrious hand gestures, he conducted his show with glorious fanfare. Despite Melvin’s powerful stage presence, his assistants, three handsomely dressed monkeys, always stole the show.

But during a performance at the Hare’s Bluff Opera House, Melvin faced disaster. The show started off well. Abracadabra, who preferred to be called Abbey, carried out the rings and magic wand for his warm-up tricks and showed off her satin ball gown. Another worthy assistant, Hocus, later climbed in a box which Melvin proceeded to saw in half, not even scratching the tuxedo-clad monkey inside. Pocus was normally the best behaved of the three animals and, thus, was chosen for the disappearing monkey illusion.

Pocus disappeared all right. Just before his cue, he spotted a stage rope hanging from the ceiling and couldn’t resist climbing it. The others quickly followed suit, leaving a speechless, red-faced Melvin on stage below.

When Melvin looked up, Pocus, who weighed 20 lb, descended the rope at an acceleration of 5 ft/sec2. Below him, Abbey, who weighed 25 lb, climbed up at a constant speed of 2 ft/sec2. Under her, Hocus, weighing 15 lb, pulled himself up at an acceleration of 3 ft/sec2. With the monkeys on the move, what was the tension in the rope?

Hint: Treat the rope and monkeys as a complete system.

Solution to problem 241, November, 2000: Gridlock






Sponsored Recommendations

NEW Low Profile, Ultra Compact Power Supplies

March 13, 2024
Learn more HERE about Altech's Power supplies!

Altech's Liquid Tight Strain Relifs Catalog

March 13, 2024
With experienced Product Engineers and Customer Service personnel, Altech provides solutions to your most pressing application challenges. All with one thought in mind - to ensure...

Industrial Straight-Through Cable Gland

March 13, 2024
Learn more about Altech's cable glands and all they have to offer for your needs!

All-In-One DC-UPS Power Solutions

March 13, 2024
Introducing the All-In-One DC-UPS, a versatile solution combining multiple functionalities in a single device. Serving as a power supply, battery charger, battery care module,...

Voice your opinion!

To join the conversation, and become an exclusive member of Machine Design, create an account today!