Why the Top is not falling down when it in rotation, and why it is falling down after the rotation ?

Question

Top is haveing single pin pointed bottom, It is rotating and standing independantly without any supporting is given when it is rotating, whereas same top is falling down after the rotation is completed, Why ? in two wheelers and are all we are balanceing when it is in movement but top is not haveing any other extrodinary forces from out side for balanceing it's position ?

Answer 1

Nonrotating top:
If you stand an object like your top on its pin, it will fall down. Do it and watch: the gravitational pull on the top rotates the top around the tip of the pin. Right? So the gravitational pull is exerting an angular force called torque on the top. That is the responsible force for it falling.

Rotating top:
Now stand the rotating top on its pin. The torque is still there, but the top has an angular momentum. If you exert torque on an angular momentum it results in a rotational like movement. Watch your spinning top. It does not stand completely upright, its rotational axis makes kind of circular movements. Also, the faster the top is rotating, the more stable it stands. When the top spins slow, the axis mores around very fast.

Similar to cycles, only the axis are in plane and not upright like the top.

Answer 2

It has nothing to do with cetrifugal force, but is a result of the gyroscope effect:

"A gyroscope is a device for measuring or maintaining orientation, based on the principle of conservation of angular momentum. In physics this is also known as gyroscopic inertia or rigidity in space. The essence of the device is a spinning wheel on an axle. The device, once spinning, tends to resist changes to its orientation due to the angular momentum of the wheel."

In other words, the top has angular momentum, similar to the linear momentum of a ball rolling on a flat surface it will keep rolling until some force stops it. The top's angular momentum keeps it from tilting. When the top stops spinning, it no longer has angular momentum.

Answer 3

Simple Physis Will tell U that the top is always on the bottem. U do this..... Take a half a glass of water and U take a spoon & a fork and u put them 2gather. Kinda of shittttttttttttttittrrrrrrr om to each other. Find a equial point of both and insert a toothpick and allow the construction 2 lay 3/4s from the outside of the rim. THEM U TELL ME , Bubba why does it not fall.

Answer 4

the force holding a spinning top from falling is also known as centrifugal..it is the same force that holds you down on the carnival ride known as "The Gravitron"...basically when the top slows down the centrifugal force holding it upright wanes and therefore causes it to fall over.