Oncology & Cancer

Cancer cells 'talk' to their environment, and it talks back

Interactions between an animal cell and its environment, a fibrous network called the extracellular matrix, play a critical role in cell function, including growth and migration. But less understood is the mechanical force ...

Neuroscience

Brain activity predicts the force of your actions

Researchers have found a link between the activity in nerve clusters in the brain and the amount of force generated in a physical action, opening the way for the development of better devices to assist paralysed patients.

Health

Some breastfeeding advice worth ditching: US task force

A review of scientific evidence on breastfeeding out Tuesday found that some long-held advice is worth ditching, including that babies should avoid pacifiers and moms should breastfeed exclusively in the first days after ...

Medical research

Skeletal stem cells regress when tasked with extensive regeneration

Adult mouse skeletal stem cells in the jaw revert to a more developmentally flexible state when called upon to regenerate large portions of bone and tissue, according to a study by researchers at the Stanford University School ...

Health

Exercise, not vitamins, urged to prevent falls in seniors

Falling is the leading cause of injury-related death among people over age 65, and seniors who want to avoid falls should exercise, not rely on supplements like vitamin D, US guidelines said Tuesday.

Neuroscience

Mechanoceuticals: Bioengineers use magnetic force to manage pain

UCLA bioengineers have demonstrated that a gel-like material containing tiny magnetic particles could be used to manage chronic pain from disease or injury. Broadly, the study demonstrates the promising use of biomechanical ...

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Force

In physics, a force is any influence that causes an object to undergo a change in speed, a change in direction, or a change in shape. In other words, a force is that which can cause an object with mass to change its velocity (which includes to begin moving from a state of rest), i.e., to accelerate, or which can cause a flexible object to deform. Force can also be described by intuitive concepts such as a push or pull. A force has both magnitude and direction, making it a vector quantity. Newton's second law, F=ma, was originally formulated in slightly different, but equivalent terms: the original version states that the net force acting upon an object is equal to the rate at which its momentum changes.

Related concepts to force include: thrust, which increases the velocity of an object; drag, which decreases the velocity of an object; and torque which produces changes in rotational speed of an object. Forces which do not act uniformly on all parts of a body will also cause mechanical stresses, a technical term for influences which cause deformation of matter. While mechanical stress can remain embedded in a solid object, gradually deforming it, mechanical stress in a fluid determines changes in its pressure and volume.

This text uses material from Wikipedia, licensed under CC BY-SA