Information

Newton and gravitation


A small, battery-powered, straight-line toy car was tied to a line.

The other end of the line was tied to a metal ring and was attached to a nail fixed to the center of a board.

When the car was started, it was found that instead of going straight circular motion.

How to scientifically explain why the wire prevents movement in a straight line?

Centripetal force concept

Analyzing the result of the experiment

The tendency for the toy car to move in a straight line causes the line to stretch. This gives rise to a line pull force. This force, acting on the toy, prevents it from proceeding in a straight line in the same direction.

At all points of your circular path The exact same thing happens: the toy tends to move in a straight line, but the pulling force prevents it from happening, continually changing the direction of movement and producing the circular path.

If, at any given moment, the line suddenly bursts or is cut off, the car will immediately leave the circular path and proceed in a straight line. In other words, once the pulling force ceases to act, the toy will automatically abandon circular motion and exit the line tangent to the circumference.

The tensile force on the wire is called centripetal force.. Centripetal force acts on every moving that describes a curved path, either a circumference or any other type of curve. This force is responsible for the fact that the movement is not rectilinear but curvilinear. The direction of the centripetal force passes through the furniture and the center of the curve described by this furniture.. And the direction of the centripetal force points to the center of this curve.

This type of force occurs, for example, in the movement of the moon around the earth. The force with which the earth draws the moon acts so that the moon changes the direction of its movement at every moment, keeping its movement around the earth in a curved path.