Young Children’s Tool
Simple machines fact
Physics is the study of matter (anything that occupies space) and energy (the ability to do work) and their relationship to each other. In the world of physical science, work is the force we exert to move something. A simple machine is a device that makes work easier by increasing force or changing the direction of a force, without electricity or other power sources. Simple machines can reduce human effort when doing any work that helps us complete tasks hard to accomplish and they have proper uses which we are going to talk about them.
There are six types of simple machines: inclined plane, wedge, lever, wheel and axle, screw and pulley. Let's go one by one.
An inclined plane consists of a sloping surface; it is used for raising heavy bodies. So, in our real life there are a lot of inclined planes such as garage exits, wheel chair ramps, stairs, slides etc.
A wedge is an object that tapers to a thin edge. Pushing the wedge in one direction creates a force in a sideways direction. It is used to break things apart, cut things, cut wood etc.
Levers help lift loads with less effort. A pry bar helps a gardener move a large stone; a jack lever makes lifting a car to change a flat tire possible; a stapler bends metal to fasten paper neatly and an old fashioned seesaw allows a child to lift a friend into the air. These and even a simple spoon or fork are all levers.
There is a wheel and axle and it's common in everyday life specially vehicles and also in pulleys. It is made up of a circular frame (the wheel) that revolves on a shaft or rod (the axle). In its earliest form it was probably used for raising weights or water buckets from wells.
Screw is the most common simple machines and it is used to join things, keep things in place or fixing things to walls or anything.
A pulley is a wheel that carries a flexible rope, cord, cable, chain, or belt on its rim. Pulleys are used singly or in combination to transmit energy and motion.
Students of Grade 5B,
The Aga Khan School, Dhaka.