Question Details

[solution] » A block of wood of width d = 0.18m, length l = 0.2m, height h =

Brief item decscription

Step-by-step solution file

Item details:

A block of wood of width d = 0.18m, length l = 0.2m, height h =

A block of wood of width d = 0.18m, length l = 0.2m, height h = 1m and weight m =27kg floats with its axis vertical in some liquid of density ? kg/m3. The equilibrium positioncorresponds to the centre of mass being 0.3m below the surface of the liquid. Initially, theblock is at its equilibrium position with a downward velocity of v0 = 0.5m/s. At the same timean external force G(t) = k cos(?t) Newton is applied to the block. Let x(t) denote the locationof the centre of mass of the block from its equilibrium position with x(t) > 0 corresponding tobelow the equilibrium position. The resistance and the kinetic energy of the liquid are bothneglected and the acceleration due to gravity is 9.8m/s2. Assume that the block never leavesor sinks in the liquid completely.[Hint: The upward force P from the liquid to the block is equal to the weight of the liquiddisplaced by the block. The block is homogenous and so the centre of mass is located at thegeometric centre.]

(a) Calculate the value of ?, the density of the liquid.

(b) Apply Newton?s law of motion on the vertical axis to prove that x(t) is described by the differential equation:     x¨ + 12.25x =k cos(?t)/27.

(c) Solve for x(t) for all ?.

(d) Let k = 5. Will ? = 2 or ? = 3.5 satisfy the assumption that the block never leaves or sinks in the liquid?[Hint: |x + y| ? |x| + |y|


About this question:

This question was answered on: Feb 21, 2020

PRICE: $24 (18.37 KB)

Buy this answer for only: $24

This attachment is locked

We have a ready expert answer for this paper which you can use for in-depth understanding, research editing or paraphrasing. You can buy it or order for a fresh, original and plagiarism-free copy (Deadline assured. Flexible pricing. TurnItIn Report provided)

Pay using PayPal (No PayPal account Required) or your credit card. All your purchases are securely protected by PayPal.

Need a similar solution fast, written anew from scratch? Place your own custom order

We have top-notch tutors who can help you with your essay at a reasonable cost and then you can simply use that essay as a template to build your own arguments. This we believe is a better way of understanding a problem and makes use of the efficiency of time of the student. New solution orders are original solutions and precise to your writing instruction requirements. Place a New Order using the button below.

Order Now