- #1
In summary, the total hip replacement is subjected to a force of F = 120N. The moment of this force about the neck at A is calculated using the formula M=rxF. To determine the moment of the force about the stem B, the same method can be applied, extending the 15° line until it gets near B. However, the distance between B and the 150° point must be known in order to accurately calculate the moment. This distance can be found by using the 10° angle and the given 150° angle.
- #2
Dr.D
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So, ... where is your work?
- #3
tiny-tim
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Welcome to PF!
Hi yosheey ! Welcome to PF!
Show us what you've tried, and where you're stuck, and then we'll know how to help!
Hi yosheey ! Welcome to PF!
Show us what you've tried, and where you're stuck, and then we'll know how to help!
- #4
jining
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Hi! I am stuck on this problem too, is there anyone that would mind showing me how to do it? My group and I are stuck.
Last edited:
- #5
tiny-tim
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welcome to pf!
hi jining! welcome to pf!
(you know what I'm going to say, don't you? …)
Show us what you've tried, and where you're stuck, and then we'll know how to help!
hi jining! welcome to pf!
(you know what I'm going to say, don't you?
…)Show us what you've tried, and where you're stuck, and then we'll know how to help!
- #6
jining
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Hello! Thanks!
Um, so I managed to get the moment about a, but I don't know what to do for b
http://imgur.com/Wx939
- #7
tiny-tim
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hello jining!
yes, your moment about A looks fine (you drew that 5° really large … good idea!)
for the moment about B, do it the same way, extending that 15° line until it gets near B …
but of course you need to know how far down B is, and the question doesn't tell you
yes, your moment about A looks fine (you drew that 5° really large … good idea!
) for the moment about B, do it the same way, extending that 15° line until it gets near B …
but of course you need to know how far down B is, and the question doesn't tell you
- #8
jining
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Yea... :| that's where I am stuck haha .. any ideas? Thanks for the help.
- #9
tiny-tim
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oh i see now, i wasn't looking at the diagram properly 
…
you can find how far that 150° point is to the right, then use the 10° to find how far down it is from there to B
…you can find how far that 150° point is to the right, then use the 10° to find how far down it is from there to B
FAQ: Determine the moment of this force
What is the definition of "moment of a force"?
The moment of a force, also known as torque, is a measure of the ability of a force to cause rotational motion around a particular axis or point.
How is the moment of a force calculated?
The moment of a force is calculated by multiplying the magnitude of the force by the perpendicular distance from the axis of rotation to the line of action of the force.
What is the unit of measurement for moment of a force?
The unit of measurement for moment of a force is newton-meter (Nm) in the SI system or pound-foot (lb-ft) in the imperial system.
What factors affect the moment of a force?
The moment of a force is affected by the magnitude of the force, the distance from the axis of rotation, and the angle between the force and the line of action.
Why is the concept of moment of a force important in physics and engineering?
The concept of moment of a force is important because it helps us understand and predict the rotational motion of objects. It is also crucial in designing and analyzing structures and machines that involve rotational motion, such as gears, levers, and pulleys.