I thought that I'm suppose to draw a line down from C to the line of action of the force. Then apply the force to that line, and imagine (ignore that)
As I'm writing my response I see that it is CCW. I have no idea why I thought it was CW and was so insistent upon that. Thank you for the reply.
Hi,
I am having trouble understanding how the signs were obtained in the moment calculation.
When I imagine the 600 N force acting on the moment arm, it moves CW which would give it a negative value. When I solve the problem I end up reviving Ay and Cy values that are swapped with the book.
Thank you for both for your replies.
My professor said that my approach to the problem was incorrect, and that the centroid has nothing to do with the problem. I didn't entirely understand why he dismissed my approach, he said something about not needing to bring the z variable into this.
This problem has really confused me. I don't understand why different approaches are leading to different answers. I believe my professor is going to want 5, but I see too much conflict to pick one answer.
LCKurtz, can you explain why that method gives an incorrect answer for a base 1, and...
Hi, thank you for your reply. I understand what you did, but I was hoping you could clarify something for me
A classmate used the following from the book to solve the problem.
He then set it 80/16 to get the answer 5.
That answer is different than both the method you used and the method I used...
Homework Statement
Homework Equations
V = (1/3) * A * H [Volume of Pyramid]
The Attempt at a Solution
The first thing I did was to calculate the height of pyramid from the volume formula. I got a perpendicular height of 15. I'm not sure where to go from there.
I'm under the impression...
Tipping is an unwritten rule in the USA. In many other countries, the idea of tipping is ludicrous. I don't like when workers, who 'rely' on tips, claim that without tips they would be making under minimum wage. It just isn't true; minimum wage kicks in. I don't see why a job like moving plates...
Thank you for the response.
In the summary of the conclusion they say a Force of Fr = 1400 N is placed at P(x,y). So I assumed they wanted a positive force.
Homework Statement
Find the magnitude and direction of a resultant force equivalent to the given force system and locate its point of application on the slab.
The Attempt at a Solution
So I summed the forces to get -1400 N, or a 1400 N force downward (the book agrees with that). Why is the...
Thank you for the prompt response SteamKing. I had a feeling that distance had some role, but I was under the erroneous impression that it either relied on distance or the force. I'll reattempt the problem now.
Edit:
It took me awhile to get it. I had always treated the distance to be a scalar...
Homework Statement
Replace the force and couple system shown by an equivalent resultant force and couple moment acting at point O.
The solution being:
I understand the force summation, but I'm a bit confused about the direction for the moment summation.
The Attempt at a Solution...
Yeah I get what you're saying now. I completely forgot a step lol. For some reason the first time I looked at it I forgot that I was doing differentiation. In my mind I had it as:
y' = e^(a+b+c)
Thank you!
Thank you for viewing my thread. I have been given the following steps for logarithmic differentiation:
1. Take natural logarithms of both sides of an equation y = f(x) and use the Laws of Logarithms to simplify.
2. Differentiate implicitly with respect to x.
3. Solve the resulting equation for...
Thank you for viewing my thread. The following is a problem from my homework that is submitted online. I have already exhausted my attempts, but I'm curious as to where I went wrong. I would appreciate if someone could lead me towards the solution.
Homework Statement
Find the critical...