Converting Potential Energy to Kinetic: Analyzing Resistant Forces

In summary, the conversation discusses the concept of potential and kinetic energy in a simple balance system. The formula mgh = 1/2 mv^2 is used to calculate the final speed at the bottom, assuming no changes in weight. The main challenge is determining the resistant forces, such as air resistance and friction in the wire and pulley. If these losses are minimal, the final speed can be accurately calculated using the formula GPE = maximum KE at bottom.
  • #1
daddylange
2
0
the way i see it is this is a simple potential to to kinetic balance.

mgh = 1/2 mv^2

the m's cancel assuming the weight isn't changing.

so here's the hard part.

calculating the resistant forces.

air resistance and friction in the wire/pulley

so can anyone get me started on how to calculate those energies and put it into my first balance?
 
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  • #2
GPE = maximum KE at bottom.

So, mgh at top = 0.5mv2 at the bottom. So you can work out the final speed.

Of course, that assumes no losses. But if you have a good bearing on the harness pulley the friction losses would be incredibly small from that and wind resistance.
 

1. What is potential energy and kinetic energy?

Potential energy is the energy an object possesses due to its position or configuration. It is stored energy that can be converted into other forms, such as kinetic energy. Kinetic energy is the energy an object has due to its motion.

2. How is potential energy converted to kinetic energy?

Potential energy can be converted to kinetic energy through the action of a force. When a force acts on an object, it can cause the object to move and thus, convert potential energy into kinetic energy. An example of this is a roller coaster, where the potential energy from the initial height of the coaster is converted into kinetic energy as it moves down the track.

3. What are resistant forces?

Resistant forces are forces that act against the motion of an object. Friction, air resistance, and gravity are examples of resistant forces. These forces can slow down or stop the motion of an object, thus converting its kinetic energy back into potential energy.

4. How do resistant forces affect the conversion of potential energy to kinetic energy?

Resistant forces can decrease the efficiency of the conversion of potential energy to kinetic energy. As an object moves, it experiences resistance from various sources, such as air resistance and friction. This resistance can cause the object to lose some of its kinetic energy as it is converted back to potential energy. Ultimately, this results in a decrease in the overall speed and distance the object can travel.

5. How can we analyze resistant forces in a system?

To analyze resistant forces in a system, we must first identify all the forces acting on an object and their direction. Then, we can use mathematical equations, such as Newton's laws of motion, to calculate the magnitude and direction of the resistant forces. Additionally, experimental data and simulations can also be used to analyze and understand resistant forces in a system.

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