Gears can make things move in different directions, more quickly or slowly. Examples of common objects with gears are non-digital clocks, vehicles, drills, manual can openers and bicycles. Another use for gears is to "expand the physical limits of the human body." Powered wheel chairs and li...
A machine is anything that multiplies or changes the direction of a force, and a pulley is no exception. This simple machine that consists of a wheel with a rope or cable around it gets its name because we use it to pull things. A fixed pulley changes only the direction of the force,...
Sleep is an activity that often eludes many adults, and unfortunately, it's sometimes regarded as a luxury. But despite much of the progress we have made, there are certain things inhuman biologywe cannot escape — this includes basic necessities like sleep. Research suggests that sleeping less...
Let’s All Just Try And Be Decent:It’s awful that you had to use the old one in that condition. It’s amazing that we have things like this but even the new one looks like it could be better. I hope the new one is more comfortable and that soon they’ll be able to replace i...
pulleys, levers, inclined planes, and wheels and axles. These machines can be found in everyday objects like playground equipment, tools, and even household items. Learning about simple machines is a fun way for kids to understand how things work and make connections to the world around them....
One of the keys to understanding how a simple machine makes things easier is to realize that the amount of work a machine can do is equal to the force used, multiplied by the distance that the machine moves or lifts the object. In other words, we can multiply the force we are able ...