# No Response to Physics Homework Help: X-Components of Reaction

• jehan60188
In summary, the conversation is about a problem with finding the x-components of the reaction in a truss structure. The left end is supported on rollers and the right end is supported on a solid support, meaning that there can only be a horizontal reaction force at the right end. This is a common structure used in building construction.
jehan60188
tried posting in homework help, but haven't received a response
would appreciate any input!

the problem: http://desmond.imageshack.us/Himg839/scaled.php?server=839&filename=truss1.png&res=medium

i can't figure out how to get the x-components of the reaction
thanks!

Last edited by a moderator:
This requires that you know how to read the universal code used by professors and textbook authors. This is secret, so do not tell anyone what I am about to divulge to you here.

The left hand end at A is supported on rollers, but the right end is supported on a solid support to ground. This means that there can be no horizontal reaction force at A but there can be at the right end. There for the entire reaction to all applied horizontal forces is taken out at the right end.

In actual fact, this is not as mysterious as it looks. Actual strictures, such as bridges, etc. are built with only one fixed point, and the other horizontal supports are on rollers.

Ah, didn't notice the roller joint, makes this problem a lot easier, thanks!

## 1. What does "X-Components of Reaction" mean in physics?

"X-Components of Reaction" refers to the horizontal forces acting on an object in a physics problem. These forces are typically represented by the letter "x" and are measured in units of Newtons (N).

## 2. Why is it important to understand X-Components of Reaction in physics?

Understanding X-Components of Reaction allows us to accurately analyze and predict the motion of objects in various scenarios. It also helps us to apply the laws of physics, such as Newton's laws of motion, to real-world situations.

## 3. How do you calculate X-Components of Reaction?

To calculate the X-Components of Reaction, you first need to identify all the horizontal forces acting on the object. Then, use vector addition to find the resultant force in the x-direction. This resultant force is the X-Component of Reaction.

## 4. Can you give an example of a problem involving X-Components of Reaction?

Sure! Let's say you have a box on a frictionless surface being pushed by two people in opposite directions. One person applies a force of 10N to the left, and the other applies a force of 8N to the right. The X-Component of Reaction in this scenario would be 2N to the left (10N - 8N = 2N).

## 5. How can I improve my understanding of X-Components of Reaction in physics?

One way to improve your understanding of X-Components of Reaction is to practice solving problems that involve these concepts. You can also review relevant equations and principles, such as vector addition and trigonometry, to strengthen your understanding. Seeking help from a tutor or teacher can also be beneficial.

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