This question is actually two questions in one -- what is the force on the Hot Wheels car, and what is the force against the surface (i.e. the track)? First, the force on the car. . . The name of the force described in the question is called centripetal force. This is the force that occurs when a body in motion (the Hot Wheels car), which would continue to travel in a straight line if untouched, is pushed to change direction (in the case of the question, due to the curvature of the track). The curvature of the track forces the car to deviate away from its natural state - travelling in a straight line. This force - the track pushing on the car and changing its direction - is centripetal force. Centripetal force always pushes inward - toward the center of the turn. It is what makes a body (such as you inside a car) turn and change direction, instead of continuing in a straight line. Many people confuse this effect with centrifugal force, which is an imaginary force - that is, centrifugal force does not exist. The imaginary centrifugal force "pushes" outward - away from the centre of the turn. We think centrifugal force is real, but our perceptions are distorted because we are in an accelerating frame of reference. When a car turns suddenly, we feel like we are pushed sideways, and we call the "force" that pushed us the centrifugal force. An independent observer (a bystander on the side of the road), who is in an inertial frame of reference, and who witnesses the same thing, will tell you did not move sideways toward the car's door, but instead the car pushed toward you (centripetal force), forcing you to turn with the car. Without centripetal force, you would have continued traveling in a straight line, and fallen out of the turning car! == == Next, the force on the surface . . . According to Newton's Third Law, "For every force, there is an equal and opposite reaction force." So, if the track pushes inward on the car (to make it travel in its circular path as discussed above), then the car pushes outward on the track with exactly the same amount of force. If you watch a Hot Wheels track as the car goes through the loop, that track will be pushed outward by the car. The tracks on some looping amusement park rides are also visibly distorted as the roller coaster passes through the loop. This "give" is built into the track, which quickly resumes its original shape once the roller coaster has passed. By the way, whenever a surface pushes against an object (like the track pushing on the looping car), the direction of that force is always perpendicular to the surface. For that reason, it is called a normal force, because "normal" is a geometric term meaning perpendicular in all directions. (It doesn't mean the opposite of abnormal.) At any point in a circular track, the normal direction is toward the center of the circle, which is why it is called centripetal, which literally means center - seeking. There is no commonly-used term for the direction of the reaction force, other than to say "outward". Some older texts once called that direction "antinormal," but that isn't used much any more.
water wheels, dams, and waterfalls
The wheels against the ground, the axles against the wheels, the chain against the axles, the pedals against the chain, and your feet against the pedals.
The wheels pushed against the water which propelled the boat forward.
Usually the water will turn some wheels or turbine; this will then turn a generator, which generates the electricity.
Greater surface area.
A diesel locomotive is actually a hybrid engine. The diesel engine generates electricity, which is transferred from a motor to the wheels.
They are called turbines, and they turn a dynamo, which generates electric current.
Because ski's are flat, they skid along the snow's surface. But wheels can get stuck under snow.
The 18 inch wheels have very large surface area which reduces the pressure that the car exerts on the road.
More stability on the rocky Martian surface
Wind resistance against the direction which the roller coaster is travelling, friction between the wheels and the surface upon which it is rolling and friction between the brakes and the wheels (if applicable) would all contribute to slow the roller coaster down.
caterpillar tracks have large surface area than wheels. larger the surface area, smaller will be the pressure. Hence tanks and buldozers are fitted with caterpillar tracks
The brake pads rub against your wheels(rotars) and creates more friction slowing the movement of the wheels.
True, but only to a point. If the surface is too rough debris can get lodged between the wheels causing them to lock up. Which generally will lead to your face meeting the previously mentioned rough surface. However if the surface is not rough enough then it is difficult for the wheels to get a grip on the surface. Which usually will also lead to a meeting between the very smooth surface and your face.
Rolling friction :)
To grip the road surface. You need tread especially in wet conditions.
There definitely is friction, as the wheels roll along the surface of the floor.
To haul heavy loads, there needs to be more wheels to carry the loads.
Rubber wheels provide a more comfortable ride since they absorb some of the vibration from the surface. They also provide more grip.
A drive shaft is found in a frnt-wheel drive vehicle. It runs from the engine and gearbox to the front wheels. The engine generates energy, known as torque. The drive shaft carries the torque to the wheels forcing them to rotate, thus moving the vehicle.
Weight distribution over the surface of the roadway.
a gym floor. anything rigid or rough such as concrete can damage the wheels.
No they are not. An inclined plane is a flat surface which has a slope to it i.e. it is flat but not level.
Less surface area contacting the ground reduces friction. Wheels are useful for moving heavy objects so you don't hurt your back.
There are alot of factors there. 1 - Weight of the chair plus the person in it 2 - Type and size of the wheels 3 - Surface the person is on 4 - The bearing in the wheels