Purchase Solution

Retracting cylinder: How far does an elevator settle as the passengers enter?

Not what you're looking for?

Ask Custom Question

A 2" diameter hydraulic ram piston supports an elevator in a 2 story building. When the elevator car is at the first floor, the piston is fully retracted into the cylinder. The piston extends 15 feet to place the empty car at the second floor. Eight passengers who each weigh exactly 150 lb. enter the car. If the bulk modulus of the hydraulic fluid is 250,000 psi, how far does the elevator settle as the passengers enter?

Purchase this Solution

Solution Summary

The expert determines how far an elevator settles as the passengers enter. The retracting cylinder is given. With clear explanations and calculations, the problem is solved.

Solution Preview

This is based on the concept of stress and strain:
Stress = wt of 8 passengers/area of ram =
wt of 8 passengers = 150*8 = 1200 lb
dia of ram = d = 2" = 2/12 ft
area of ram = pi*d^2/4 = 3.1415* (2)^2/4 = 3.1415 ...

Solution provided by:
  • BEng, Allahabad University, India
  • MSc , Pune University, India
  • PhD (IP), Pune University, India
Recent Feedback
  • " In question 2, you incorrectly add in the $3.00 dividend that was just paid to determine the value of the stock price using the dividend discount model. In question 4 response, it should have also been recognized that dividend discount models are not useful if any of the parameters used in the model are inaccurate. "
  • "feedback: fail to recognize the operating cash flow will not begin until the end of year 3."
  • "Answer was correct"
  • "Great thanks"
  • "Perfect solution..thank you"
Purchase this Solution

Free BrainMass Quizzes
Classical Mechanics

This quiz is designed to test and improve your knowledge on Classical Mechanics.

Variables in Science Experiments

How well do you understand variables? Test your knowledge of independent (manipulated), dependent (responding), and controlled variables with this 10 question quiz.

Basic Physics

This quiz will test your knowledge about basic Physics.

The Moon

Test your knowledge of moon phases and movement.

Introduction to Nanotechnology/Nanomaterials

This quiz is for any area of science. Test yourself to see what knowledge of nanotechnology you have. This content will also make you familiar with basic concepts of nanotechnology.