The spinning wheel by physics of its rotational inertia is stable. The greater the speed of the spinning wheel the greater the stability. The speed of a rotating wheel effects on how stable the wheel will be. Rotational stability of the wheel as it slows down the stability becomes less stable and as the wheel speeds up the stability increases this is why it is easier to ride a bike or motorbike the faster the wheels are spinning. A dirt bikes spinning wheel is stable even if it is not in if not touching the ground. Riders know that performing wheelies are easier to control if the front wheel is spinning faster when it's in the air. A force or torque is required to change the direction, lean or speed of a spinning wheel. A spinning wheel may …show more content…
The greater the angular momentum the larger the amount of torque required to initiate a change in direction or lean angle in a spinning wheel. Belief standing up the foot pegs of a dirt bike does not lower the center of gravity of the bike system it actually increases it. Standing increases control of a dirt bike in technical terrain for several reasons. Standing optimizes balance and increases the leaning torque and minimizes a critical moment of inertia. Rear balance is essential to make the suspension work correctly on a motorcycle. The standing position optimizes balance, allowing the suspension to function most efficiently. By shifting weight to the inner peg to initiate a turn, one applies a relatively large torque through the pegs about a bike's roll axis the line between the front and rear tire contact patches. This is a much quicker and more precise way to get a bike to turn than any input through the handlebars. Detaching the bulk of one's mass from the seat produces a much smaller moment of inertia about the roll axis allowing the increased torque generated through the pegs to more rapidly lean the bike. Stability affects roll, pitch and yaw, but not vertical or lateral displacements of the motorcycle …show more content…
Suspension components include shocks, forks, steering dampers and the rider. Though tires act in some ways as part of the suspension system they are generally considered along with the wheels to be part of the unsprung mass of the motorcycle - the portion of the bike not supported by the suspension. The function of springs or their equivalent in suspension systems is to force the displaced wheel back to its original position. The function of damping is to control the rate at which this return to the nominal position occurs. Forks and shocks are generally sprung with coil springs and damped with oil and/or gas. Motorcycle suspension components are generally adjustable for sag. Compression damping how rapidly the suspension reacts to an input and rebound damping how quickly the suspension returns the wheel to its nominal position. Racing forks and shocks often have separate circuits for high and low speed compression and rebound damping. Precise suspension settings are critical to motorcycle performance. Suspension tuning is one of the most crucial elements in racing. Suspension systems are designed to minimize stiction and to maximize damping. Damping is acquired primarily through viscous hydrodynamic
The biomechanical principle stability for a pirouette is primarily concerned with the center of mass
Many of us have gotten rock chips, but how many of us understand how those pesky rocks hit our windshield? A common misconception is that the car in front of us throws rocks "backward" and hits the following car's windshield. A rolling tire cannot throw a rock backwards. A tire is a rolling object, thus every point along the tire is moving forwards. There is no force going in a backwards direction. Only direction part of a rolling object can go is a combination of up or down, and forward.
The roller coaster has its beginnings in Russia where during the 1600's. People crafted sleds out of wood and built hills made of ice blocks. The hills had sand at the bottom to help slow down the sleds so they would not crash when they reached the bottom of the hill.1 Over time, the roller coaster has become more complex. They now are taller, faster
Since the invention of the automobile, there have been many great innovations within the industry. The suspension of the automobile serves as a good example of one of those innovations. Could you imagine riding around in your brand new Nissan Skyline GT-R, with the same suspension methods used to stabilize old horse and carriage buggies centuries ago? That would not serve its purpose very well. Due to the demands of society, vehicle stabilization became a priority to increase safety. Throughout the years, there have been different variations of vehicle suspension systems. For example, we have adaptive air, solid axle, and dead axle suspensions. Without the advancements made in the way we travel and transport goods, civilization could not prosper the way it has.
A roller coaster is a thrill ride found in amusement and theme parks. Their history dates back to the 16th century. It all started in Russia, with long, steep wooden slides covered in ice. The idea then traveled to France. Since the warmer climate melted the ice, waxed slides were created instead, eventually adding wheels to the system. The first roller coaster in which the train was attached to the track was in France in 1817, the Russess a Belleville. The first attempt at a loop-the loop was also made in France in the 1850s. It was called the Centrifuge Railway. However, government officials quickly diminished the idea when the first accident occurred. Inventors since then have continued to capitalize on people’s love of a great thrill, always trying to make them bigger, faster and scarier!
In short brakes are a tool that turn kinetic energy into heat(http://en.wikipedia.org/wiki/Brakes). This is accomplished by applying friction in one way or another. In the case of disk brakes friction is created because the braking mechanism exerts a force on the break pads which pushes them into contact with disk. It is this contact combined with the fact that the disks are rotating that causes kinetic energy to be converted to heat.
Lift kits on trucks change the angle of the driveshaft and can cause U-joint and powertrain issues. Slamming a vehicle drastically changes the alignment angles causing the automobile to wear out tires quickly. Another difference between suspension modifications and the upgrades mentioned above is the amount of work involved in returning it to a factory original condition.
he TriFit system was designed by Polar, the technological innovators in heart rate monitors since 1977. Polar, which was once known as Healthfirst, swtiched its name to Polar in the 1990's which is when it developed the firt model of the Trifit software. The first EKG accurate wireless heart rate monitor was invented by Polar back in 1977 as a training tool for the Finnish National Cross Country Ski Team. The concept of "intensity training" by heart rate swept the athletic world in the eighties. By the 1990's individuals were looking to heart rate monitors not only for performance training needs, but also for achieving everyday fitness goals. Today, the same concept of heart rate training is being used by world-class athletes as well as everyday people trying to lose weight.
Today, engineers rely on damping systems to counteract nature's forces. There are many types of damping systems that engineers can now use for structures, automobiles, and even tennis rackets! This site focuses on damping systems in structures, mainly architectural variations of the tuned mass damper.
The main advantage of the track over the wheels is that it can distribute a very large force over a large area. That means that instead of applying all the force on little area where wheels touch the ground, it applies it over the whole area of the track.
You apprehensively walk up the iron steps and onto the platform. You’re reluctant to go any further, but your friend eggs you on, saying, “It’s not that fast.” You step into the seat and pull the harness down over you. No, this isn’t the latest, greatest technological frontier. It’s a roller coaster. Since 1804 when the first wheeled roller coaster- called “Les Montagnes Russes”- was constructed in Paris, France, roller coasters have been a staple of adventure and fantasy among children and children-at-heart. But there’s no magic involved with these fantastic creations, there’s a plethora of forces and laws governing their every movement. From kinetic energy to inertia, roller coasters are intricate engineering marvels that function through the laws of physics. This is a look into those physics that result in a thrill ride unlike any other.
Good stability and handling is achieved with a combination of suspension, steering, acceleration, brakes and weight distribution.
Womanism in Alice Walker’s The Color Purple “Every time they ask me to do something, Miss Celie, I act like I’m you. I jump right up and do just what they say” (88). This line conveys how obedient Celie is towards others, which she learns from her own people. The black community degrades black women to make it difficult for them to become independent (Tanritanir and Aydemir 438).
...ads. The theory behind this is that a non-rotating tire has less traction than a spinning one. The ABS will allow the vehicle to stop faster than when the wheel is skidding and allow the driver to remain in control of the vehicle while it stops. With the technology today, there are sensors attached to the wheels to sense when one wheel is spinning at a different speed than another.
There are many different types of suspension systems that are used in cars today, and some that were discontinued due to their uselessness. One example of an older suspension system is called the swing axle suspension. This is a very old type, used in many sports cars in the 50’s, but had disappeared for about 2 decades. This was due to the weakness of the system. The handling was awful, as the camber angle can be noticeably changed by a simple bouncing motion, and the change of the static weight and body roll as the car took a corner. The only advantage to this type of system was that it could provide independent shock absorption. (Wan)