1. Two concurrent forces of 6 newtons and 12 newtons could produce the same effect as a single force of _____
1) 5 N 2) 15 N 3) 20 N 4) 72 N
It just says the two concurrent forces, but I don't know the angle between them, then how can I find the resultant?
2. Two concurrent forces of 40 newtons and X newtons have a resultant of 100 newtons. Force X could be ____
1) 20 N 2) 40 N 3) 80 N 4) 150 N
It's like the same thing as the previous one, so how can I find it.
3. What does it mean by potential drop? same thing as potential difference?
Thanks.
QUOTE (mia6+Jun 24 2008, 04:05 AM)
1. Two concurrent forces of 6 newtons and 12 newtons could produce the same effect as a single force of _____
1) 5 N 2) 15 N 3) 20 N 4) 72 N
It just says the two concurrent forces, but I don't know the angle between them, then how can I find the resultant?
I would say 6N, but if there is no angle then question is stupid as imposible.
Anser should be 140 N, but somthing wrong with your questions.
Anser should be 140 N, but somthing wrong with your questions.
3. What does it mean by potential drop? same thing as potential difference?
maybe diference of mass.
1) 5 N 2) 15 N 3) 20 N 4) 72 N
It just says the two concurrent forces, but I don't know the angle between them, then how can I find the resultant?
I would say 6N, but if there is no angle then question is stupid as imposible.
QUOTE
2. Two concurrent forces of 40 newtons and X newtons have a resultant of 100 newtons. Force X could be ____
1) 20 N 2) 40 N 3) 80 N 4) 150 N
It's like the same thing as the previous one, so how can I find it.
1) 20 N 2) 40 N 3) 80 N 4) 150 N
It's like the same thing as the previous one, so how can I find it.
Anser should be 140 N, but somthing wrong with your questions.
QUOTE (->
| QUOTE |
| 2. Two concurrent forces of 40 newtons and X newtons have a resultant of 100 newtons. Force X could be ____ 1) 20 N 2) 40 N 3) 80 N 4) 150 N It's like the same thing as the previous one, so how can I find it. |
Anser should be 140 N, but somthing wrong with your questions.
3. What does it mean by potential drop? same thing as potential difference?
maybe diference of mass.
QUOTE (mia6+Jun 24 2008, 05:05 AM)
It just says the two concurrent forces, but I don't know the angle between them, then how can I find the resultant?
They are concurrent, it means they are parallel and pointing in the same direction. But in neither case do you get given a correct answer.
They are concurrent, it means they are parallel and pointing in the same direction. But in neither case do you get given a correct answer.
at most x+y, at least x-y. so the result "could be" between these...
[using psp to type]
[using psp to type]
At least in my language, "concurrent" doesn't mean parallel. So:
1) 6N and 12N can sum to anything between 6N and 18N depending on the angle, and the only response within the interval is 15N.
2) This depends again on the angle, the unknown force can be between 60N and 140N, and the only possibility among the proposed responses is 80N.
3) In electricity? I'd take them as synonyms, except maybe that "drop" applies only to electricity consumers like a lamp, not to generators like a battery.
Just hoping that the forum helps you understand your course and not short-circuit it.
1) 6N and 12N can sum to anything between 6N and 18N depending on the angle, and the only response within the interval is 15N.
2) This depends again on the angle, the unknown force can be between 60N and 140N, and the only possibility among the proposed responses is 80N.
3) In electricity? I'd take them as synonyms, except maybe that "drop" applies only to electricity consumers like a lamp, not to generators like a battery.
Just hoping that the forum helps you understand your course and not short-circuit it.
This lectures want that students to solve some puzzles like in some stupid game... It is not math but somthing like brain-training, I hate such questions. 
[edit] a slightly more detailed version of xaos' post.
All concurrent means is that they pass through a common point. The question is not asking you for a specific answer but something that "could produce the same effect" as the two forces. In my opinion the question is badly worded but thats a bit besides the point.
1)
Look at the possibilities: minimum possible force is when the forces are antiparallel so = 12 - 6 = 6N
max possible is when they are parallel so = 12 + 6 = 18N
All other possibilites must be between these numbers.
2)
Again, form an equation for the max and min resultant forces:
Max : X + 40 = 100
make X the subject: X = 100 - 40 = 60N
Min X - 40 = 100
X = 100 + 40 = 140N
X must lie between these values.
3)
Can you give us the context of the term "potential drop?"
All concurrent means is that they pass through a common point. The question is not asking you for a specific answer but something that "could produce the same effect" as the two forces. In my opinion the question is badly worded but thats a bit besides the point.
1)
Look at the possibilities: minimum possible force is when the forces are antiparallel so = 12 - 6 = 6N
max possible is when they are parallel so = 12 + 6 = 18N
All other possibilites must be between these numbers.
2)
Again, form an equation for the max and min resultant forces:
Max : X + 40 = 100
make X the subject: X = 100 - 40 = 60N
Min X - 40 = 100
X = 100 + 40 = 140N
X must lie between these values.
3)
Can you give us the context of the term "potential drop?"
In regards to the first two questions, prometheus/enthalpy/xais are cirrect
QUOTE (mia6+Jun 23 2008, 11:05 PM)
3. What does it mean by potential drop? same thing as potential difference?
Yes, analogous to voltage drop in electronics, which is a voltage difference
maybe diference of mass.
DavidD, if you have less IQ than a pea, stop trying to help out people on their homework. You're an absolute idiot.
Yes, analogous to voltage drop in electronics, which is a voltage difference
QUOTE
maybe diference of mass.
DavidD, if you have less IQ than a pea, stop trying to help out people on their homework. You're an absolute idiot.
QUOTE (Enthalpy+Jun 24 2008, 04:28 PM)
At least in my language, "concurrent" doesn't mean parallel. So:
1) 6N and 12N can sum to anything between 6N and 18N depending on the angle, and the only response within the interval is 15N.
2) This depends again on the angle, the unknown force can be between 60N and 140N, and the only possibility among the proposed responses is 80N.
3) In electricity? I'd take them as synonyms, except maybe that "drop" applies only to electricity consumers like a lamp, not to generators like a battery.
Just hoping that the forum helps you understand your course and not short-circuit it.
Thanks. That helps.
1) 6N and 12N can sum to anything between 6N and 18N depending on the angle, and the only response within the interval is 15N.
2) This depends again on the angle, the unknown force can be between 60N and 140N, and the only possibility among the proposed responses is 80N.
3) In electricity? I'd take them as synonyms, except maybe that "drop" applies only to electricity consumers like a lamp, not to generators like a battery.
Just hoping that the forum helps you understand your course and not short-circuit it.
Thanks. That helps.
QUOTE (prometheus+Jun 24 2008, 07:08 PM)
[edit] 3)
Can you give us the context of the term "potential drop?"
Ok. it's in a question, The algebraic sum of all the potential drops and applied voltages around a complete circuit is equal to zero. This is an application of the law of conservation of ...
Can you give us the context of the term "potential drop?"
Ok. it's in a question, The algebraic sum of all the potential drops and applied voltages around a complete circuit is equal to zero. This is an application of the law of conservation of ...
QUOTE (prometheus+Jun 24 2008, 07:08 PM)
3)
Can you give us the context of the term "potential drop?"
Ok. it's in a question, The algebraic sum of all the potential drops and applied voltages around a complete circuit is equal to zero. This is an application of the law of conservation of ...
Can you give us the context of the term "potential drop?"
Ok. it's in a question, The algebraic sum of all the potential drops and applied voltages around a complete circuit is equal to zero. This is an application of the law of conservation of ...
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