# Simple Machines - Street

## 19 terms

### Fixed Pulley

A pulley in which the load doesn't rise and fall with the load being moved.

### Movable Pulley

A pulley in which it does rise and fall with the load being moved.

The object being moved or lifted. The output force.

### First-Class Lever

A lever in which the fulcrum is between the effort and the load.

### Second-Class Lever

A lever in which the load is between the effort and the fulcrum.

### Third-Class Lever

A lever in which the effort is between the fulcrum and the load.

### Block and Tackle

A compound system of pulleys.

The ratio of the output force to the input force.

### Three basic types of levers

Lever, Pulley and Wheel & Axle

### Fulcrum

The pivot point of a lever.

### The number of supporting ropes is equal to

The mechanical advantage in a block and tackle

### Wheel & Axle

A lever or pulley connected to a wheel.

### Ramp

The most basic kind of inclined plane.

### Screw

An inclined plane wrapped around a cylinder.

### Wedge

Functions like two inclined planes back to back.

### Compound Machine

A machine that combines two or more simple machines.

### 6

How many types of simple machines are there?

### Lever & Inclined Plane

Two families of simple machines.

### Rigid arm and a fulcrum

Levers have what two things?