mechanical advantage

Simple machines make the things in everyday life work. These simple machines are often used in more complex devices, like airplanes and cranes. There are six primary types of simple machines: pulley, screw, inclined plane, wheel and axle, wedge, and lever.

Scientists divide the six simple machines into two fam- ilies: the lever family and the inclined plane family. The lever family includes the simple lever, the pulley, and the wheel and axle.

Here is a list of some everyday examples of simple machines.

• Pulley. Blinds. Garage Doors. Flag Poles.
• Lever. See Saw. Pry Bar. Hammer.
• Wedge. Scissors. Knife. Axe. Splitting Maul.
• Wheel and Axle. Toy Cars. Office Chairs. Bicycles.
• Inclined Plane. Wheel Chair Ramp. Skateboard Ramp. Slides.
• Screw. Jar Lid. Drill Bit. Bolt. Light Bulb. Bottle Caps.

Wheel and axle The wheel is considered to be one of the most significant inventions in the history of the world.

Simple Machines in the Home

• Inclined Plane – A ramp, for example a wheelchair ramp.
• Wheel & Axle – On lawnmowers and wheelbarrow.
• Lever – The bottle opener.
• Pulley – Old wood windows, some garage doors, workshop or garage lifting systems.
• Wedge – The shim – used throughout the home in construction.

lever

Examples of third-class levers would be spoons, shovels, and baseball bats. The mechanical advantage is always less than 1. The order would be load, effort, and then fulcrum.

Spoons are also simple machines called levers. A lever has two main parts: a bar and a fulcrum. The fulcrum enables the bar to move up and down. For the lever to work, there also have to be an effort (you must push or pull on the bar) and a load (something you are trying to move).

wheel and axle

Examples: Pulley‐tape measure, Lever‐hammer, screw‐drill, wedge‐saw, wheel & axle‐dolly, & Incline plane‐stairs (This one is a hard one and there are not very many.)

The correct answer is – WHEEL AND AXLE type and Inclined plane. An electric fan is considered to be a mixture of several simple machines. It includes the Wheel and Axle type, wedges, and the Inclined plane types. The blades of an electric fan are the inclined planes and the wedges.

The basic purpose for which most simple machines are designed is to reduce the effort (force) required to perform a simple task. To achieve this, the force applied must act over a longer distance or period of time resulting in the same amount of work being performed by a smaller force.

The principle of simple machine states that “if there is no friction in a simple machine, work output and work input are found equal in that machine.” Mathematically, Output work = Input work. or, L * LD = E * ED.

There are basically six types of machine:

• The inclined plane. – used for raising a load by means of a smaller applied force.
• The lever. – involves a load, a fulcrum and an applied force.
• The pulley. – In simplest form it changes the direction of a force acting along a cord or rope.
• The screw.
• The wedge.
• The wheel and axle.

There are three ways simple machines make work easier: by increasing the distance through which force is applied, by changing the direction of applied force, or by multiplying force of speed of the energy applied. The wheel and axle is a machine in which the wheel is attached to a central axle.

Terms in this set (70) When do you work? When you exert a force in an object that causes the object to move some distance in the same direction as the exerted force.

wedges

A lever is a long, sturdy body that rests on a support called a fulcrum. The fulcrum is the place where the lever pivots. It is one of the three parts or actions that work together in a lever. The load is the object that is being lifted or affected.

Option A) is the correct answer. This is because Scissor generally consists of wedge, fulcrum, and the lever.