What is the main purpose of using machine?

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.

What are the four functions of machine?

A machine has the following functions:

to act as a force multiplier.
to multiply speed.
to change the direction of the effort applied for greater ease and comfort.
to shift the point of application to a convenient place.

What are the two functions of machine?

Various functions that a machine can perform are:

Changing the direction of applied force- Example: When a flag is hoisted with the help of a pulley.
Changing the magnitude of applied force- Example: Bottle opener multiplies the applied force and much less effort is required to open the cap.

What is the difference between a simple machine and a mechanism?

Machine: an assemblage of parts that transmit forces, motion and energy in a predetermined manner. Simple Machine: any of various elementary mechanisms having the elements of which all machines are composed. In kinematics, a mechanism is a means of transmitting, controlling, or constraining relative movement (Hunt 78).

Are tongs a third class lever?

Tweezers and tongs are third-class levers because the fulcrum is at one end and the load is at the other. You must use human effort in the center of the lever to pinch the tweezers or tongs to grasp and lift or remove materials.

What is the difference between a lever and a linkage?

With a class 2 lever, the fulcrum is at one end, the effort is at the other end and the load is in the middle. With a class 3 lever, the pivot is at one end, the load is at the other and the effort is in the middle. A linkage is a mechanism made by connecting together levers.