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  1. What is tension? (article) - Khan Academy

    What is the tension in the rope? First we draw a force diagram of all the forces acting on the box. Now we use Newton's second law. The tension is directed both vertically and horizontally, so …

  2. The force of tension (video) | Tension | Khan Academy

    Tension refers to the force that is transmitted through a string, rope, wire, or other similar object when it is pulled tight, trying to restore the object to its original, unstretched length. Learn how …

  3. Introduction to tension (video) - Khan Academy

    Learn how tension, the force within or applied by a string or wire, counteracts gravity to keep objects stationary. Explore how tension varies in different scenarios, like in a system with …

  4. Introduction to tension (part 2) (video) | Khan Academy

    Learn how to calculate tension in wires using trigonometry, vector components, and algebra. Understand how tension varies in different wires based on their angle and force of gravity.

  5. Khan Academy

    Ropes pull on things! Learn how to handle that kind of force.

  6. Surface tension (video) | Chemistry of life | Khan Academy

    At the surface of water, molecules are more densely packed because they are not being pulled from above, resulting in stronger intermolecular forces. This creates surface tension, which …

  7. What is tension? (article) - Khan Academy

    It's important to note here that tension is a pulling force since ropes simply can't push effectively. Trying to push with a rope causes the rope to go slack and lose the tension that allowed it to …

  8. Cohesion and adhesion of water (article) | Khan Academy

    Cohesive forces are responsible for surface tension, a phenomenon that results in the tendency of a liquid’s surface to resist rupture when placed under tension or stress.

  9. Surface Tension and Adhesion (video) | Khan Academy

    Unravel the enigma of surface tension and adhesion in liquids, particularly water. Discover how cohesion between water molecules forms surface tension, enabling denser objects, like a …

  10. Surface tension (video) | Khan Academy

    At the surface, water molecules pull inward, creating a "skin" that's stronger than the liquid below. This tension allows water striders to walk on water and paperclips to float, highlighting the …