Surprising Applications of the Magnus Effect. An athlete uses physics to shatter world records - Asaf Bar-Yosef. Fun Gravity. What Is The Magnus Force? Dynamic lift and Swing Bowling. Chapter 3 Biomechanics Presentation. Base of Support. Introduction The base of support (BOS) refers to the area beneath an object or person that includes every point of contact that the object or person makes with the supporting surface.
These points of contact may be body parts e.g. feet or hands, or they may include things like crutches or the chair a person is sitting in. Significance The BOS is an important concept to understand to understand an individual's ability to Balance, as balance is defined as the ability to maintain the line of gravity (passing through the Centre of Gravity) within the BOS.
In gait, the base of support has been defined as the horizontal stride width during the double-support phase when both feet are in contact with the ground and the whole-body center of gravity (CG) remains within the BOS. A wide base of support (BOS) has long been believed to be a hallmark of unsteady gait.  Clinical Implication Recent Related Research (from Pubmed) Read 4 Credit. CENTER 4. Center of gravity - A basic explanation of balancing weight. By Chris Woodford.
Last updated: December 26, 2015. What goes up must come down—that's one way of understanding gravity. We think of gravity as a force that pulls things downward (toward Earth's center), but it doesn't always work like that. Sometimes gravity can make things turn and topple over, especially if they are high up and unbalanced. Tightrope walkers understand this better than anyone. Photo: A tightrope walker has an instinctive command of physics. What is "center of gravity"? Throw a ball in the air and gravity pulls it straight back down.
Photo: Why does center of gravity matter? Why do tall things topple over? Thinking about center of gravity helps us answer questions like this. To see how that works, try opening a door by pushing the handle with one finger. Physics for Kids: Momentum and Collisions. Science >> Physics for KidsWhat is momentum?
Momentum is a measurement of mass in motion. Any object that is moving has momentum. In physics, momentum of an object is equal to the mass times the velocity. momentum = mass * velocity Momentum is usually abbreviated using the letter "p" making the equation look like: p = m * v where p is the momentum, m is the mass, and v is the velocity. From this equation you can see that both the velocity of the object and the mass have an equal impact on the amount of momentum. How to Measure Momentum Momentum is typically measured in kilograms times meters per second (kg*m/s) or newton-second (N s). Fun Acceleration Facts for Kids. Acceleration is a way that we measure how fast or the speed of something.
Whether it’s a bike or a car, you know that when you press the gas pedal or start pedaling faster on your bike that you begin to increase your speed. The amount of increase is the acceleration. There are various things that affect acceleration. Let’s say that you were riding your bike and you stopped pedaling. You would notice that the bike is beginning to slow down. One of the main causes of acceleration is gravity.
Isaac Newton studied the results that Galileo came up with and continued observations and calculations. The idea of ‘linear acceleration’ is what happened in the example of the ball rolling down an inclined plank and then being hit to increase the speed or velocity. There are two factors that acceleration depends upon: direction and velocity. A typical example of circular acceleration might be to consider the motion of the moon as it travels around the earth. Important words to know: Sponsored Links. Physics for Kids: Speed and Velocity. Science >> Physics for Kids Although speed and velocity are often used interchangeably in everyday life, they represent different quantities in physics.
What is speed? Speed is a measurement of how fast an object moves relative to a reference point. It does not have a direction and is considered a magnitude or scalar quantity. Speed can be figured by the formula: Speed = Distance/Time or s = d/t How to Measure Speed In the United States we mostly think of speed in miles per hour or mph. The measurement of speed can reflect two different scalar quantities. Instantaneous Speed - The speed of an object at a given moment. Velocity is the rate of change in an object's position. Velocity = the change in distance/change in time Velocity = Δx/Δt How to Measure Velocity. Linear Motion Example.