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Related Concept Videos

Design Example: Designing Water Slide01:18

Design Example: Designing Water Slide

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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....
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Buoyancy and Stability for Submerged and Floating Bodies01:11

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In fluid mechanics, buoyancy and stability are key concepts for understanding the behavior of submerged and floating bodies. When a stationary body is fully or partially submerged in a fluid, the fluid exerts a force on the body known as the buoyant force. This force acts vertically upward through a point called the center of buoyancy, which is the center of the displaced fluid volume. According to Archimedes' principle, the magnitude of the buoyant force is equal to the weight of the fluid...
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Rolling Without Slipping01:09

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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...
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Buoyancy01:12

Buoyancy

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When an object is placed in a fluid, it either floats or sinks. All objects in a fluid experience a buoyant force. For example, a metal ball sinks, while a rubber ball floats. Similarly, a submarine can sink and float by adjusting its buoyancy.  The concept of buoyancy raises several interesting questions. For instance, where does this buoyant force come from? How much buoyant force is required to make an object sink or float? Do objects that sink get any support at all from the...
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Hydraulic Jump01:29

Hydraulic Jump

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A hydraulic jump is a sudden rise in fluid depth in open channels, occurring when high-velocity (supercritical) flow transitions to low-velocity (subcritical) flow. This phenomenon requires an upstream Froude number greater than 1, as flows with Fr1<1 remain subcritical, making a hydraulic jump impossible due to the need for negative head loss, which violates thermodynamic principles.The characteristics of a hydraulic jump depend on the upstream Froude number and are classified as...
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Adaptations that Reduce Water Loss01:57

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Though evaporation from plant leaves drives transpiration, it also results in loss of water. Because water is critical for photosynthetic reactions and other cellular processes, evolutionary pressures on plants in different environments have driven the acquisition of adaptations that reduce water loss.
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Related Experiment Video

Updated: Mar 17, 2026

Measurement of Dynamic Force Acted on Water Strider Leg Jumping Upward by the PVDF Film Sensor
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A Bizarre Risk of Barefoot Waterskiing.

A J Pearl, J L Freeman, J J Hurwitz

    The Physician and Sportsmedicine
    |July 21, 2016
    PubMed
    Summary

    A snapped towrope caused a blinding eye injury to a boat driver. The incident resulted in a ruptured globe and orbital fractures, highlighting waterskiing safety risks.

    Area of Science:

    • Ophthalmology
    • Trauma Surgery
    • Sports Medicine

    Background:

    • Waterskiing involves inherent risks, including potential equipment failure.
    • Towrope incidents can lead to severe ocular and facial trauma.
    • Understanding injury mechanisms is crucial for prevention and treatment.

    Purpose of the Study:

    • To report a case of severe eye and orbital injury from a snapped waterski towrope.
    • To describe the clinical presentation and management of such a traumatic event.
    • To emphasize the importance of safety protocols in waterskiing.

    Main Methods:

    • Case report of a boat driver injured by a waterski towrope.
    • Clinical examination and imaging to assess the extent of ocular and orbital damage.

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  • Surgical intervention for globe rupture and orbital fractures.

    • Main Results:

    • The patient sustained a ruptured right globe.
    • Multiple fractures of the inferior and medial orbital rims were identified.
    • The injury resulted in a blinding visual impairment.

    Conclusions:

    • Towrope failures in waterskiing can cause devastating ocular and facial injuries.
    • Prompt medical and surgical management is essential for severe eye trauma.
    • Enhanced safety measures and equipment checks are recommended to prevent similar accidents.