## Conical pendulum

3 forces acting on a conical pendulum Gravity(=mg): The force the Earth pulls. Tension: The force applied to both ends of the thread. Tension is always directed to the center from both ends. Centripetal force(Fc): The force that maintains circular … more

## Spring pendulum(horizontal)

This simulation ignored the effects of friction. Simple harmonic oscillation In everyday life, we see a lot of movements that repeated the same oscillation. Like below, shaky or suspended objects are doing this oscillation. Clock pendulum An object suspended in … more

## The principle of riding a swing

Kids have the know-how, but they can’t tell the principal. “How can you go so high?” Some principles are difficult to describe in words in the world, even if everyone knows. I think one of them is how to ride … more

## Period of Physical Pendulum

A pendulum that vibrates is one of a ‘simple pendulum’ or ‘physical pendulum.’ A simple pendulum is a case in which an object’s angular motion can be ignored, such as a small object suspended from a string. Most pendulums are … more

## Why do we see only one side of the moon?

Why do we always see the same side of the moon? The moon’s rate of rotation and rate of revolution is the same.

## Spring Pendulum(Vertical)

This simulation ignored the effects of friction. Simple harmonic oscillation In everyday life, we see a lot of movements that repeated the same oscillation. Like below, shaky or suspended objects are doing this oscillation. Clock pendulum An object suspended in … more

## Gravity Train

Like this simulation, if you drill a hole in the earth and throw it in, you can send it to the other side of the earth. This simulation ignores the effects of friction. The earth is assumed to be a … more

## Why does the moon rise 50 minutes later each day?

The reason why the moon rises 50 minutes late every day While the Earth rotates once a day, the Moon moves to the east little by little. So it takes 50 minutes to 24 hours for the moon to be … more