Homework Statement
Hi, I was working on a homework problem and could not resolve it. The problem reads as follows:
A ladder that weighs 240N rests against a frictionless wall at an angle of 60 degrees from the ground. A 600-N man stands on the ladder three-fourths of the distance from the...
So the Kinetic energy for any rotating object depends on it's Moment of Inertia? Taking the moment of inertia of a solid sphere and combining it with the value for translational KE, I get (9/10)MV^2 for the KE of a rolling bowling ball and soling for h in mgh = (9/10)mv^2, the value is 5.88m.
But the book has an answer for (a) of this problem. Is there some way to deduce the torque needed to accelerate the wheel? When I looked at this problem, I suspected that without the time, acceleration or displacement to the new angular velocity, there would be no way to determine the torque...
Hello, I have a problem that I have not been able to solve
Homework Statement
Here is the problem question:
A bowling ball rolling at 8 m/s begins to move up an inclined plane. What height does it reach?
Homework Equations
The equation that I used was the formula relating...
Hi, I was working on a problem and I am having trouble in being able to solve this problem. The difficulty is that the question only presents not enough data to find the answers that it asks for.
Homework Statement
Here is the problem in it's entirety:
A wheel whose moment of inertia is...
To all of you, thank you for your responses. I like the link at PASCO and the <a href="http://www.pasco.com/family/structures-systems/index.cfm"> [Broken] Structures-Systems</a> kit is amazing. I will follow up on your suggestions.
Hello, I live in an area where the local university does not have any night classes. I want to restart my education and any courses in physics are not available when I am not working. I am posting this message here in order to test the feasibility of acquiring the text books, notes, lab...
So was my method of solving the problem correct? Looking at the book's answer, it does not seem right. If one is going five meters a second, your velocity is high and so you need to apply a great deal of revolutions to the wheels via the pedals.
One more question, what publishers, authors or books do you recommend for learning the basics of physics Azizl? I am interested in strengthening my skills.
Azizl, would you be referring to the quotient of the radius_out / radius_in? or as it is known as the Ideal Mechanical Advantage, in terms of torque transmission? When I use that in an equation, I will get an answer of 73 revolutions per minute. The book's answer is 7.3 revs per minute. Is...
The method that I used to get the answer that was the most similar to the answer in the book was this.
I took the diameter of the wheel, divided it in half and came up with 2.04m for the circumference of the wheel. Then I divided the desired velocity (5 m/s) by the circumference of the wheel...
Homework Statement
The problem that I was working on and was not able to resolve. This is the problem straight from the book:
12.13) The sprocket wheel on the rear axle of a certain bicycle is 10 cm diameter, and the sprocket wheel to which the pedals are attached is 20 cm in diameter...
Hello, I am interested in finding out what are the primary fields of study for a degree in Mechanical Engineering. I also want to know how these fields of study fit together. If any one can help, please contact me. Thank you.
Hi everyone, my apologies for replying back so late. I am using Win XP for my OS for general work (at the moment). Thank all of you for the information.
Hi, I am looking for a TeX\LaTeX editor, preferably a freeware or shareware version. I want to work on learning this scripting language for working in the Physics Forums.
Hi Gneil, I worked out the problem in the way you recommended. The values I found for the currents relative to the resistors were close but not exactly to what the book had. I got a value of -0.924A for the 10 Ohm resistor while the book's answer is -0.935. For the 3 and 5 Ohm resistors, my...
Collinsmark I will not be able to figure out the currents of the circuits until I have the voltage of each pathway. From all of your responses I still do not understand how to resolve this problem. If I use the recommended values for determining the terminal voltages that you put in your post...
Hello everyone, sorry to respond so late. If I understand what you are saying, to get the value of cap R in the formula for the current for the terminal voltage, I follow the path from the negative terminal of the battery to the first resistance that I encounter, excluding the resistance of the...
Homework Statement
I am working on a direct current circuit and in the problem it has two power sources (batteries), three loads (resistances) and three circuit pathways. Two of the resistances are on the same path. The batteries are shown with their voltages in emf and not their terminal...