Tetrahedron - a polyhedron composed of four triangular faces, three of which meet at each corner or vertex. It has six edges and four vertices. The tetrahedron is the simplest of all the ordinary convex polyhedra and the only one that has fewer than 5 faces.
Magnetic Ball Bearings = uB3R - cOol! Capable of variable sculptural compositions.
Kit: Scale model of the Leonardo da Vinci Catapult. Principle - Function based on "spring-energy" stored in the bent wood to give power to the swing arm. Simple to assemble. Fits in well with my devices/gadgets.
Solar Powered Turbine model - Modified the motor mount for more stability - "cOol" to watch in operation...
Elm Tree
Spinning top gif & dice
Neodymium (Nd) Magnets 5mm
Maxwell's wheel is the classic way of showing the interplay between potential energy and kinetic energy. It consists of an axle-mounted flywheel suspended by nylon cords at both ends. Wind it up to the top of the frame and let it go! As it drops, gravitational potential energy changes to kinetic energy of the wheel's descent and rotation. When it has unwound to the bottom, the sharp jerk on reaching the end of the nylon cords reverses its linear momentum (while maintaining its angular momentum). This "collision" at the bottom is nearly elastic - some of the kinetic energy is lost. The ratio of energy kept to starting energy tells you how "elastic" the collision was through its coefficient of restitution.
Newton's cradle, named after Sir Isaac Newton, is a device that demonstrates conservation of momentum and energy via a series of swinging spheres. When one on the end is lifted and released, it strikes the stationary spheres; a force is transmitted through the stationary spheres and pushes the last one upward. The device is also known as Newton's balls or Executive Ball Clicker.
Pendulum Wave. A pendulum is a weight suspended from a pivot so that it can swing freely. When a pendulum is displaced sideways from its resting equilibrium position, it is subject to a restoring force due to gravity that will accelerate it back toward the equilibrium position. When released, the restoring force combined with the pendulum's mass causes it to oscillate about the equilibrium position, swinging back and forth. The time for one complete cycle, a left swing and a right swing, is called the period. The period depends on the length of the pendulum, and also to a slight degree on the amplitude, the width of the pendulum's swing.
From its examination in around 1602 by Galileo Galilei, the regular motion of pendulums was used for timekeeping, and was the world's most accurate timekeeping technology until the 1930s.
Comments