1, cut the cardboard into cardboard paper tape, and the length and width can be determined as required.
2. Carefully poke a small round hole in a piece of paper and thread the rope through it. Be careful not to break the paper tape.
3. Fix the paper tape on the iron frame with a rope, and fix the pendulum in a proper position by using the attraction of two ring magnets with different poles.
The development history of pendulum clock
A clock with a pendulum as its vibration system. Usually it has the function of telling time, so it is also called a clock. 1582- 1583, Italian physicist and astronomer Galileo discovered the isochronism of pendulum. 1657, Dutch physicist and astronomer Christian Huygens invented the pendulum clock by using the isochronous principle of the pendulum. After continuous improvement, it has been used to this day.
Pendulum clocks can be made into seat clocks, wall clocks, floor clocks, master clocks of master and slave clocks, astronomical clocks and other types according to their uses and requirements. Pendulum clocks usually tell the time by mechanical ticking, but they also tell the time by electronic amplification. The pendulum clock used in modern courts is often equipped with a set of mechanical transmission mechanism to tell the time with the moving images of figures, landscapes, birds and animals made by seiko.
Pendulum clocks use the isochronism of simple pendulum. It is this characteristic that can be used for timing. The periodic formula of a simple pendulum is: time = 2 times π times (the length of the root divided by the acceleration of gravity). Through the formula and its derivation, it can be seen that the motion of a simple pendulum depends on gravity and the tension of the rope. The period of swinging only depends on the swinging length of the rope and the acceleration of gravity.