## Movement

Published November 05, 2017

Published November 05, 2017

Published November 05, 2017

**Inertia** in Latin means "peace", "inaction". Inertia, or inertia, is the desire of the body to keep its state unchanged with respect to the inertial (in the first
approximation fixed) frame of reference. That is, if no external forces act on the body (applied from other bodies and the environment in general) or if these forces...

Published November 05, 2017

Indeed, untwisted carousel, - and turn yourself by inertia. But **rotation by inertia** Is it? And what's the difference between inertia of rectilinear and
rotational motion? We will carry out the following experiment. We will try to rotate a rod around the vertical axis with masses (weights) loaded on it, for example, with
metal balls. While these balls are near the center, spinning the rod is easy, inertia is small...

Published November 05, 2017

It is interesting, whether there is **weightlessness** in objects in the fall, i.e., while they are flying down, of course, without taking into account air resistance.
Weighing gives a zero result - nothing weighs, neither light nor heavy. And if there is no weight - hence, weightlessness? Is it so easy to get weightless even on Earth?..

Published November 05, 2017

When one talks about fluctuations, one usually remembers a **pendulum**. Why does he hesitate? And what are its fluctuations remarkable? If the load
on the suspension is considered a small heavy point (such a pendulum is called mathematical), then the period T of oscillations is directly proportional to the square
root of the length of the pendulum...

Published November 05, 2017

What happens when the frequency sound is less than 16 Hz? Such fluctuations are **infrasound**. Perfectly spreading in the water, infrasound helps
whales and other marine animals navigate in the water column. Hundreds of kilometers - for infrasound is not a hindrance. The infrasound affects the person in a
peculiar way. Somehow in the theater for the play about the times of the Middle Ages ordered the famous physicist R. Wood (1868-1955) a huge organ pipe, it seems,
in 40 m long...