- #1
Vectors physics homework -- Addition of two vector forces
In summary, the conversation is about a user named Ahmad trying to solve a math problem and posting a picture of their work. Another user, possibly a moderator, suggests that they type their work into the forum for easier understanding. They also mention the use of math symbols and a tutorial for using LaTeX. Another user points out that Ahmad's variable x is not the same as the one in the exercise, making it difficult to decipher. They ask for clarification and suggest finding a relevant equation. Finally, they provide a link for Ahmad to read.
- #2
berkeman
Mentor
- 67,123
- 20,039
Welcome to the PF.
Your attachment is sideways and pretty hard to read. Can you please type your work into the forum? That makes it a lot easier to respond.
There are math symbols in the Edit bar above the edit window under the √ symbol, and there is a tutorial about how to use LaTeX under the Help pages (see INFO at the top of the page). Thanks.
Your attachment is sideways and pretty hard to read. Can you please type your work into the forum? That makes it a lot easier to respond.
There are math symbols in the Edit bar above the edit window under the √ symbol, and there is a tutorial about how to use LaTeX under the Help pages (see INFO at the top of the page). Thanks.
- #3
BvU
Science Advisor
Homework Helper
- 15,998
- 4,814
Hello Ahmad, 
!
My neck still hurts from trying to read your picture ( I use a desktop, not a phone). For the sake of others I re-post it:
I notice your x is not the ##x## in the exercise (which is your ##\theta### ) so that deciphering isn't just painful, but also confusing.
As @berkeman (who types faster) says: could you re-post and explain what it is you write down?
In the mean time you can try to find a relevant equation that links ##\cos\theta## and ##\cos(\theta/2)## and post that too
Oh, and: read this
!My neck still hurts from trying to read your picture ( I use a desktop, not a phone). For the sake of others I re-post it:
I notice your x is not the ##x## in the exercise (which is your ##\theta### ) so that deciphering isn't just painful, but also confusing.
As @berkeman (who types faster
) says: could you re-post and explain what it is you write down?In the mean time you can try to find a relevant equation that links ##\cos\theta## and ##\cos(\theta/2)## and post that too
Oh, and: read this
Last edited:
Related to Vectors physics homework -- Addition of two vector forces
What is a vector in physics?
In physics, a vector is a mathematical quantity that has both magnitude (size) and direction. It is represented by an arrow and can be used to describe physical quantities such as force, velocity, and acceleration.
How do we add two vector forces?
In order to add two vector forces, you must first determine the direction and magnitude of each force. Then, you can use vector addition to add the two forces together. This is done by placing the tail of one vector at the head of the other vector and drawing a line connecting the two tails. The resulting vector from the tail of the first vector to the head of the second vector is the sum of the two forces.
What is the difference between vector addition and scalar addition?
Vector addition takes into account both the magnitude and direction of the quantities being added, while scalar addition only considers the numerical values. In other words, vector addition is a geometric operation, while scalar addition is a simple arithmetic operation.
Can vectors be negative?
Yes, vectors can have negative values. This indicates the direction of the vector. For example, a force acting in the negative x-direction would have a negative x-component.
How do I determine the resultant vector from multiple vector forces?
To determine the resultant vector from multiple vector forces, you can use the same process as adding two vector forces. Place the tail of one vector at the head of the previous vector, and continue until all the vectors have been added. The resulting vector from the tail of the first vector to the head of the last vector is the resultant vector.
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