Vector Dynamics on an Inclined Plane

In summary, the conversation discusses the concept of net force and opposing forces in a scenario where a block is moving up an incline at a constant rate. The individual explains how they solved the problem by using the equation for net force and determining that the opposing forces would be friction on the incline and the weight of the block. They also address a question about the force of tension and how it is caused by the other block in the system.
  • #1
seiferseph
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http://i2.photobucket.com/albums/y15/seiferseph/untitled.jpg

recently had this question on a test, we're told the left block moves up the incline at a constant rate. here's what i did

Fnet = Fappl - Fopp
Fnet = 0 because no acceleration

Fopp = Fappl

the applied force would only be the weight of the right one, and the opposing force would only be friction on the incline?
does the force weight of A (Fw for a times sin theta) also oppose the motion?
 
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  • #2
The net force on WHAT is zero? Do a force diagram for each block. The one on the right has a force of gravity pulling down and a force of tension pulling up, however it is sitll descending, which tells you something.
 
  • #3
whozum said:
The net force on WHAT is zero? Do a force diagram for each block. The one on the right has a force of gravity pulling down and a force of tension pulling up, however it is sitll descending, which tells you something.

that is taking the system, since there is no accel the fnet if the system is zero, and the applied force is the weight of the hanging one. i was wondering what the opposing forces would be.
 
  • #4
The right block (descending) has an et force of zero, which means the force of gravity pulling down equals the force of tension, pulling up. What's causing the force of tension? The other block, so what's the force on the other block...
 
  • #5
just got it, thanks!
 

1. What is a vector in physics?

A vector in physics is a quantity that has both magnitude and direction. It is represented graphically by an arrow, with the length of the arrow representing the magnitude and the direction of the arrow representing the direction.

2. What is the difference between a scalar and a vector?

A scalar is a quantity that has only magnitude, while a vector has both magnitude and direction. Examples of scalars include temperature, mass, and time. Examples of vectors include displacement, velocity, and force.

3. How do you add vectors in physics?

To add vectors in physics, you must use the head-to-tail method. This involves placing the tail of one vector at the head of the other vector, and then drawing a new vector from the tail of the first vector to the head of the second vector. The resulting vector is the sum of the two original vectors.

4. What is the importance of vector dynamics in physics?

Vector dynamics is important in physics because it allows us to accurately describe the motion of objects. By considering the magnitude and direction of forces, we can predict how an object will move and how much force is required to produce a certain motion.

5. What are some real-life applications of vector dynamics?

Vector dynamics has many real-life applications, including understanding the motion of projectiles, analyzing the forces acting on a moving vehicle, and predicting the path of a satellite in orbit. It is also used in fields such as engineering, sports, and navigation.

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