Untitled Flashcard Set

What is a machine?

A machine is a device that helps us do work.

What is a simple machine?

A simple machine is a tool or device made up of one basic machine.

What are the six simple machines?

1. Lever 2. Inclined plane 3. Wedge 4. Screw 5. Pulley 6. Wheel and axle.

What is a lever?

A lever is a rigid bar or plank that can rotate around a fixed point called a fulcrum.

What is a first-class lever?

In a first-class lever, the fulcrum is between the load and the effort.

What is a second-class lever?

In a second-class lever, the load is between the effort and the fulcrum.

What is a third-class lever?

In a third-class lever, the effort is between the load and the fulcrum.

What does an inclined plane do?

An inclined plane allows you to lift a heavy object using a smaller force over a larger distance.

What is a wedge?

A wedge is similar in shape to an inclined plane but is used to split an object apart.

What is a screw?

A screw is a cylinder with a spiral cut around the outside that helps increase force.

What is a pulley?

A pulley is a rope on a grooved wheel used to help lift larger loads.

What is a wheel and axle?

A wheel and axle is a combination of two wheels of different diameters that turn together.

What is a complex machine?

A complex machine is a device made of several simple machines that work together.

What is mechanical advantage?

Mechanical advantage is the amount by which a machine can multiply a force.

How is mechanical advantage calculated?

Mechanical advantage is calculated by dividing the output force by the input force.

What is the formula for work?

Work = Force x Distance.

What is efficiency in mechanical systems?

Efficiency is a measurement of how well a machine uses energy.

What is pressure in fluids?

Pressure is a measure of the amount of force applied to a given area.

What is Pascal's Law?

Pressure applied to an enclosed fluid is transmitted equally in all directions.

What is hydraulic systems’ importance?

Hydraulic systems use a liquid under pressure to move a load and increase mechanical advantage.