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  2. Rotation around a fixed axis - Wikipedia

    en.wikipedia.org/wiki/Rotation_around_a_fixed_axis

    Under translational motion, the change in the position of a rigid body is specified completely by three coordinates such as x, y, and z giving the displacement of any point, such as the center of mass, fixed to the rigid body. Purely rotational motion occurs if every particle in the body moves in a circle about a single line. This line is ...

  3. Net force - Wikipedia

    en.wikipedia.org/wiki/Net_force

    How a force accelerates a body. In the example shown in the diagram opposite, a single force acts at the application point H on a free rigid body. The body has the mass and its center of mass is the point C. In the constant mass approximation, the force causes changes in the body motion described by the following expressions:

  4. Physical change - Wikipedia

    en.wikipedia.org/wiki/Physical_change

    Physical changes occur when objects or substances undergo a change that does not change their chemical composition. This contrasts with the concept of chemical change in which the composition of a substance changes or one or more substances combine or break up to form new substances. In general a physical change is reversible using physical means.

  5. Newton's laws of motion - Wikipedia

    en.wikipedia.org/wiki/Newton's_laws_of_motion

    Newton's laws are often stated in terms of point or particle masses, that is, bodies whose volume is negligible. This is a reasonable approximation for real bodies when the motion of internal parts can be neglected, and when the separation between bodies is much larger than the size of each.

  6. Motion - Wikipedia

    en.wikipedia.org/wiki/Motion

    A car is moving in high speed during a championship, with respect to the ground the position is changing according to time hence the car is in relative motion . In physics, motion is when an object changes its position with respect to a reference point in a given time.

  7. Diffusion - Wikipedia

    en.wikipedia.org/wiki/Diffusion

    A change in concentration over a distance is called a concentration gradient, a change in pressure over a distance is called a pressure gradient, and a change in temperature over a distance is called a temperature gradient. The word diffusion derives from the Latin word, diffundere, which means "to spread out".

  8. Your Body Never Forgets Muscle. So Here's How Long It ... - AOL

    www.aol.com/body-never-forgets-muscle-heres...

    “Your body might not be ready for the same intensity when you return to an activity like weightlifting, but you’ll rebuild muscle faster because you don’t need to relearn the skill,” adds ...

  9. Hemodynamics - Wikipedia

    en.wikipedia.org/wiki/Hemodynamics

    Blood flow ensures the transportation of nutrients, hormones, metabolic waste products, oxygen, and carbon dioxide throughout the body to maintain cell-level metabolism, the regulation of the pH, osmotic pressure and temperature of the whole body, and the protection from microbial and mechanical harm.