Recent content by zewei1988

I am curious as to how to find the moment at both of the fully fixed end (something like cantilever) of a beam. The details of the beam are as follow: The beam is 5m long It is fully fixed at both ends The first distributed load starts at 1.35m from the left, and ends at 1.65m from the...

Sorry. my Qa and va are volume flow rate and velocity in jet A, Qb and vb are volume flow rate and velocity in jet B. I've already solved part (i) of the question. Since the velocity of water jet in A and B are horizontal in direction, i felt there was no need to consider the weight in solving...

Homework Statement I am supposed to find the mass flow rate for the two resulting water jets. Homework Equations Bernoulli's equation Mass Continuity equation Momentum equation The Attempt at a Solution I've assumed the two areas for jet A and B to be equal, and used mass...

can anyone help?

Homework Statement The question asks for current I1 and I2. Homework Equations The Attempt at a Solution I managed to get the answer using KCL at a few different nodes, but I am unsure why my first attempt was wrong. For question 3a, I tried using KVL at the left most mesh. My...

It's not a homework question, but I have no idea of how to prove it to you. It's something that was mentioned in my notes, and I tried checking Wikipedia and my recommended textbook, but I still do not understand those two points.

How does shot peening help improve fatigue life, or rather, how does the compressive surface stress imposed help improve fatigue life? How does materials having high elastic moduli and large grain size prevent creep?

I dun really know.

kinetic? cos it's moving?

Ok, here are my workings: Eqn 1: 23(9.8) - T1 = 23a T1 = 225.4 - 23a Eqn2: T2 = 13.6a + 133 Eqn3: 0.13T1 - 0.13T2 = (0.5 * 5 * 0.132) * (a / 0.13) T1 - T2 = 2.5a Sub Eqn2 and Eqn1 into Eqn3: 92.4 = 158.5a a = 0.583 m/s2 5 = 0.5 * 0.583 * t2 t = 4.14s The correct...

Homework Statement Consider the system shown in the figure with m1 = 23.00 kg, m2 = 13.60 kg, R = 0.13 m, and the mass of the uniform pulley M = 5.00 kg. Object m2 is resting on the floor, and object m1 is 5.00 m above the floor when it is released from rest. The pulley axis is frictionless...

I'm sorry, but isn't what you are trying to do the same as what I did? I tried doing it using your method but I arrive at the same answer as I had gotten earlier.

But which friction coefficient should I use? Static or Kinetic?

Homework Statement The tires of a 1500 kg car are 0.600 m in diameter and the coefficients of friction with the road surface are µs = 0.800 and µk = 0.600. Suppose the car has a disk brake system. Each wheel is slowed by the frictional force between a single brake pad and the disk-shaped...

Homework Statement An elevator system in a tall building consists of a 710 kg car and a 810 kg counterweight, joined by a cable that passes over a pulley of mass 280 kg. The pulley, called a sheave, is a solid cylinder of radius 0.700 m turning on a horizontal axle. The cable has comparatively...