# Your question: Why do you stay upright on a bike?

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If anyone ventures an answer they most often say that it’s because of the “gyroscopic effect” – but this can’t be true. Put simply, the gyroscopic effect occurs because a spinning wheel wants to stay spinning about its axis, just as a spinning top or even planet Earth stay aligned to their spin axes.

## Why don’t you fall over on a bike?

The most common explanation is that the wheels on a bike act as a gyroscope, preventing the bike from falling over. … The bike had two front wheels, one on the ground and rotating forward, and one off the ground rotating backward. This way, the total angular momentum was zero.

## Why does a spinning wheel stay upright?

So, in a cheating nutshell, tops stay upright because falling over violates angular momentum. … The torque (from gravity) creates a greater and greater component of angular momentum pointing horizontally, and the friction slows the top and decreases the vertical component of its angular momentum.

## Should I be able to stand over my bike?

5 Answers. For a standard bike in normal use you should not, from the seat, be able to touch the ground (without leaning, or except, perhaps, on extreme tip-toe). … One way to fit the seat height is to have someone hold the bike while you pedal backwards with your heels on the pedals.

## Why can you balance on a moving bike?

Unless torque, or twisting force, is applied from outside the system to change the wheels’ angular momentum, that momentum and the direction of the momentum remain constant. … It’s easy for you to move them, but hard for an outside force to do the same, and so the bike is easy to keep balanced but doesn’t topple easily.

## Why does a bike turn when you lean?

A cyclist must lean into a turn to prevent tipping over in the other direction. … The frictional force provides the centripetal force necessary to turn the cyclist to the left. But the frictional force also produces a clockwise torque that will cause the rider and bicycle to tip clockwise to the right.

## How do you not fall off a bike?

To avoid this, lean away from the ﬂoor, keeping your body upright until the last moment. Push your bike down so that the bars and inside pedal take the sting out of the fall, and then roll over your shoulder and onto your back as your body hits the road.

## What keeps a gyroscope spinning?

GYROSCOPES. A gyroscope is an object free to spin in space. In the absence of external torques a gyroscope will maintain its angular momentum. An external torque applied in the same direction or in a direction opposite to the angular momentum will cause the gyroscope to speed up or slow down.

## Why does a rotating wheel not fall?

Instead of falling flat, the effect of gravity on the spinning wheel is a slow rotation around the string – physicists call this rotating motion of a spinning wheel precession. The reason the bike wheel does not fall flat when it is spinning is because, like all moving objects, it has momentum.

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## What is a gyroscopic effect?

Gyroscopic effect is ability (tendency) of the rotating body to maintain a steady direction of its axis of rotation.

## Should your feet touch the ground when sitting on a bike?

When you sit on the saddle, both feet should reach the floor and the balls of your feet should be touching the ground. … The handle bars on your bike should ideally be in line with your saddle or slightly above the saddle.

## What size bike should I buy for my height?

#1 – Simple Size Chart