## Gear

Gear In general gears, the direction of rotation is reversed each time it is bitten. By adjusting the radius ratio of the gear, you can adjust the rotational angular speed and torque. When power is transmitted from a small gear … more

## Minimal force required for the lever

Lever A lever is a tool that transmits force using a rod. With a lever, you can work with it having little force. The length of the lever can adjust the minimum force required to move the lever. Work at … more

## ‘Work’ in science

‘Work’ in science ‘Work’ in science and ‘work’ in everyday life is a little different. In science, ‘work’ is to apply a force to an object and move it in the force’s direction. In the following cases, It is said … more

## In a potential energy measurement experiment, why should an object be lifted slowly at a constant velocity?

In a potential energy measurement experiment, why should an object be lifted slowly at a constant velocity? When we apply a force to an object and move it in the direction of the force, we say that we have done … more

## Pulleys with Many Wire

Movable Pulley Movable pulleys can move axes, unlike fixed pulleys. Movable pulleys have the advantage of being able to move with less force. But, the distance that I have to move is longer than the fixed pulley. So, there is … more

## Pulleys with One Wire

Movable Pulley Movable pulleys can move axes, unlike fixed pulleys. Movable pulleys have the advantage of being able to move with less force. But, the distance that I have to move is longer than the fixed pulley. So, there is … more