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Related Concept Videos

Energy Diagrams - I01:14

Energy Diagrams - I

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The dynamics of a mechanical system can be easily understood by interpreting a potential energy diagram. Since energy is a scalar quantity, the interpretation of the dynamics of the system becomes even simpler.
Take the example of a skater on a parabolic ramp. The potential energy at different points along the ramp will be proportional to the height of the ramp, which varies quadratically with the horizontal position on the ramp. As the skater moves down the ramp from the highest position,...
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Energy Diagrams - II01:10

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Energy diagrams are important to understand the dynamics of a system. The topology of an energy diagram helps illustrate the equilibrium points of the system.
The point in the energy diagram at which the system’s potential energy is the lowest is known as the local minima. The system tends to stay in this position indefinitely unless acted upon by a net force. The slope of the potential energy diagram at the local minima is zero, indicating that zero net force is acting on the system. The...
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Elastic Potential Energy01:01

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Elastic potential energy is the energy stored as a result of the deformation of an elastic object, such as the stretching of a spring. An object is elastic if it returns to its original shape and size after being deformed. 
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Power Expended by a Constant Force00:57

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The relationship between work done and the time taken to do it can be explained using the concept of power. For example, several sprinters in a race may have the same velocity when they reach the finish line, therefore doing the same amount of work, but the winner does it in the least amount of time. Thus, power is defined as the rate of doing work. Since work can vary as a function of time, the average power is defined as the work done during a time interval, divided by the time interval.
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Elastic Collisions: Case Study01:15

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Elastic collision of a system demands conservation of both momentum and kinetic energy. To solve problems involving one-dimensional elastic collisions between two objects, the equations for conservation of momentum and conservation of internal kinetic energy can be used. For the two objects, the sum of momentum before the collision equals the total momentum after the collision. An elastic collision conserves internal kinetic energy, and so the sum of kinetic energies before the collision equals...
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Organisms must balance energy intake with the energy required for growth, maintenance and reproduction. These trade-offs result in a variety of survivorship and reproductive strategies, including semelparity and iteroparity. Semelparous species, like annual plants, have only one reproductive episode in their lifetimes and consequently have short lifespans. Iteroparous species, by contrast, have many reproductive events during their lifetimes but have relatively few offspring. These two...
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Determining the Contribution of the Energy Systems During Exercise
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Developing a mathematical model to predict energy expenditure while bouncing on a trampoline.

Keith Alexander1, Tane Clement2, Nick Draper2

  • 1Department of mechanical engineering, University of Canterbury, Christchurch, New Zealand.

European Journal of Sport Science
|February 11, 2020
PubMed
Summary
This summary is machine-generated.

Researchers developed a model to measure energy expenditure during trampolining. This new method uses only the user's weight to predict calorie burn, making trampolining a more trackable fitness activity.

Keywords:
Trampoliningenergy expenditurerecreationsports

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Area of Science:

  • Exercise Physiology
  • Biomechanics

Background:

  • Trampolining is a popular recreational activity.
  • Currently, no established methods exist for indirectly measuring energy expenditure during trampolining.

Purpose of the Study:

  • To develop a predictive model for estimating energy expenditure during trampolining.
  • To enable accurate tracking of calorie expenditure for health and fitness applications.

Main Methods:

  • Developed a model to calculate energy absorbed by the trampoline using drop tests.
  • Measured energy conversion efficiency in healthy adults trampolining, utilizing gas analysis to record energy expenditure.
  • Combined data from both stages to create a predictive model.

Main Results:

  • A model was successfully created to predict energy expenditure while trampolining.
  • The model requires only the user's weight as input.
  • This facilitates on-trampoline energy expenditure tracking.

Conclusions:

  • The developed model provides a novel method for measuring trampolining energy expenditure.
  • This innovation can enhance the utility of trampolines for health and fitness monitoring.
  • Future applications may include integration into smart trampoline devices.