Solving Differential Equations for Inclined Plane.

In summary, the conversation discusses finding the value of S(t) in a problem involving a block sliding down a slope. The equations are provided, but the solution is not fully understood. The question of what R represents is raised, and the suggestion is made to use a coordinate system aligned with the slope for an easier solution. The value of R is determined to be either an arbitrary force or mg cos(φ), depending on its definition. The formula for S is determined to be (x^2+(xtanφ))^0.5 based on the given image.
  • #1
sergej21
3
0

Homework Statement



http://img192.imageshack.us/img192/6482/asderl.jpg

Find S(t).

Homework Equations



I managed to find these equations, but don't know how to solve them completely.

mx``=Rsinφ
my``=Rcosφ-mg
xtgφ+y=h
x`(0)=0; x(0)=0; y`(0)=0; y(0)=h

The Attempt at a Solution


Need to find s(t). Is S=(x^2+y^2)^0.5?Thank you!
 
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  • #2
sergej21 said:
Need to find s(t). Is S=(x^2+y^2)^0.5?

According to the picture, s=(x^2+(xtanφ))^0.5.

ehild
 
  • #4
The question : what is R. If it is an arbitrary force, perpendicular to the surface, you have done. If it is the normal reaction force the slope exerts on the block, R=mg cos(φ).

The solution of the problem "block sliding down on slope" is much easier with a coordinate system where the axes are aligned parallel with and perpendicular to the slope.

ehild
 

1. What is a differential equation?

A differential equation is a mathematical equation that relates a function or set of functions to its derivatives. It describes the rate of change of a system over time, and is commonly used to model various physical phenomena.

2. How do you solve differential equations?

The method for solving differential equations depends on the type of equation. Some common techniques include separation of variables, substitution, and using integrating factors. In the case of inclined planes, the equations can often be solved using basic trigonometry and algebra.

3. What is an inclined plane?

An inclined plane is a simple machine that is a flat surface angled at an incline. It is commonly used to reduce the force needed to lift an object by spreading the force over a longer distance. In physics, inclined planes are often used to study the motion of objects moving on a slope.

4. How are inclined planes related to differential equations?

Inclined planes can be used to model various physical systems, such as objects sliding down a slope under the influence of gravity. This motion can be described by a differential equation, which can then be solved to determine the position, velocity, and acceleration of the object at any given time.

5. What are some real-world applications of solving differential equations for inclined planes?

Differential equations for inclined planes can be applied in many fields, such as engineering, physics, and mechanics. They can be used to study the motion of objects on slopes, design ramps and slides, and analyze the forces and energy involved in various systems. Additionally, they can be used to model natural phenomena, such as the motion of a rolling ball or the movement of water down a hill.

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