quiz robotics

simple machine

is a basic mechanical device for applying a force and doing work.

Lever

is made up of a straight rigid object which pivots on a turning point to move or lift an object.

Bar

a long plank. It may be wood, metal or any durable material.

Fulcrum

a point on the bar creating a pivot

Effort

applied at one point to move/lift an object

Load

object to be moved/lifted

Class 1

The fulcrum is between the effort and the load. (Seesaw)

Class 2

The load is between the effort and the fulcrum. (Wheelbarrow)

Class 3

The effort is between the load and the fulcrum. (Shovel)

Wheel and Axle

is used to move objects across distances. It uses a wheel with a rod attached in the middle as an axle to help it to lift or move loads.

Pulley

uses a wheel with a groove in it and a rope. It is used to move the load or change direction of the force. The following are the types of pulley.

Movable Pulley

The load is attached to the pulley and both of them can move from place to place.

Compound Pulley

a combination of pulleys designed to make the effort less than half of the weight of the load. (Block and Tackle)

inclined plane

is a flat surface with one end higher than the other. It allows heavy objects to slide up to a higher point or down to a lower point.

wedge

consists of two (2) inclined planes, giving it a thin end and thick end to cut, split, or tighten an object.

Mechanical advantage

indicates how much a machine can increase or decrease the force on a load, compare with the effort force.

Mechanical efficiency

is the ratio of the work output to work input.