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Related Concept Videos

Rolling Without Slipping01:09

Rolling Without Slipping

People have observed the rolling motion without slipping ever since the invention of the wheel. For example, one can look at the interaction between a car's tires and the surface of the road. If the driver presses the accelerator to the floor so that the tires spin without the car moving forward, there must be kinetic friction between the wheels and the road's surface. If the driver slowly presses the accelerator, causing the car to move forward, the tires roll without slipping. It is essential...
Design Example: Designing Water Slide01:18

Design Example: Designing Water Slide

When designing a water slide, controlling the speed of water flow is crucial for rider safety while maintaining an exciting experience. As water flows down the slide, gravity causes it to accelerate, with its speed at the bottom depending on the height from which it starts. The higher the slide, the more potential energy the water has at the top, which is converted into kinetic energy as it descends, increasing its speed.
Bernoulli's principle determines the water's velocity along the slide.
Rolling With Slipping01:14

Rolling With Slipping

Rolling with slipping is a physical phenomenon that occurs when a rolling object experiences both rotational and linear motion but also experiences frictional forces that cause slipping. This phenomenon can occur in various situations, such as when a tire rolls on a wet road or a ball rolls on a rough surface.
An object's rolling motion is characterized by its rotation around its axis, while linear motion refers to the object's translational motion along a surface. Frictional forces can affect...
Eccentric Loading01:16

Eccentric Loading

Eccentric loading is a crucial concept in the study of structural engineering and mechanics, particularly when analyzing the stability and stress distribution in columns. Unlike centric loading, where the force is applied along the centroidal axis, causing uniform compression, eccentric loading occurs when a force is applied off-center. This off-center application introduces not only direct compressive stress but also bending stress, significantly influencing the column's behavior under load.
Rolling Resistance: Problem Solving01:17

Rolling Resistance: Problem Solving

Rolling resistance, also known as rolling friction, is the force that resists the motion of a rolling object, such as a wheel, tire, or ball, when it moves over a surface. It is caused by the deformation of the object and the surface in contact with each other, as well as other factors like internal friction, hysteresis, and energy losses within the materials. Rolling resistance opposes the object's motion, requiring additional energy to overcome it and maintain movement. In practical...
Motor Unit Stimulation01:20

Motor Unit Stimulation

When the neuron of a motor unit fires an action potential, it triggers a series of events, leading to a twitch contraction in the muscle fibers. The process of excitation-contraction coupling is crucial in relaying the action potential to the muscle fibers.
The latent period of contraction marks the onset of excitation-contraction coupling, when the action potential propagates across the sarcolemma, preparing the muscle fibers for contraction. As the fibers enter the contraction phase, the...

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Related Experiment Video

Updated: Jun 9, 2026

Determining and Controlling External Power Output During Regular Handrim Wheelchair Propulsion
08:55

Determining and Controlling External Power Output During Regular Handrim Wheelchair Propulsion

Published on: February 5, 2020

Ergometer rowing with and without slides.

A Holsgaard-Larsen1, K Jensen

  • 1Institute of Clinical Research, University of Southern Denmark, Odense, Denmark. ahlarsen@health.sdu.dk

International Journal of Sports Medicine
|September 10, 2010
PubMed
Summary

Adding a slide to rowing ergometers increases stroke frequency but lowers force. While biomechanical load is reduced, slide ergometers maintain or increase training demands on anaerobic energy sources.

Related Experiment Videos

Last Updated: Jun 9, 2026

Determining and Controlling External Power Output During Regular Handrim Wheelchair Propulsion
08:55

Determining and Controlling External Power Output During Regular Handrim Wheelchair Propulsion

Published on: February 5, 2020

Area of Science:

  • Sports Science
  • Biomechanics
  • Exercise Physiology

Background:

  • Rowing ergometers are widely used for training.
  • Slide systems aim to simulate on-water rowing dynamics.
  • Understanding the impact of slides on training is crucial.

Purpose of the Study:

  • To compare biomechanical and physiological variables between slide and stationary rowing ergometers.
  • To assess the training load implications of using slide ergometers.

Main Methods:

  • Seven elite female rowers participated.
  • Rowing performance was assessed on slide and stationary ergometers at various intensities.
  • Biomechanical data (force, velocity) and physiological data (oxygen uptake) were collected.

Main Results:

  • Slide rowing resulted in higher stroke frequency across all intensities.
  • Lower mean and maximal force were observed on the slide ergometer at higher intensities.
  • Maximal oxygen deficit was significantly higher during slide rowing.

Conclusions:

  • Slide ergometers reduce biomechanical load compared to stationary ones.
  • Slide ergometers provide comparable aerobic training demands.
  • Slide ergometers may offer a higher anaerobic training stimulus.