+
2 Tutorials that teach Simple Machines: Screw
Take your pick:
Simple Machines: Screw

Simple Machines: Screw

Author: Nathan Lampson
Description:

This lesson will explain how to calculate the mechanical advantage of a screw.

(more)
See More
Try a College Course Free

Sophia’s self-paced online courses are a great way to save time and money as you earn credits eligible for transfer to over 2,000 colleges and universities.*

Begin Free Trial
No credit card required

25 Sophia partners guarantee credit transfer.

221 Institutions have accepted or given pre-approval for credit transfer.

* The American Council on Education's College Credit Recommendation Service (ACE Credit®) has evaluated and recommended college credit for 20 of Sophia’s online courses. More than 2,000 colleges and universities consider ACE CREDIT recommendations in determining the applicability to their course and degree programs.

Tutorial

 

A screw is a simple machine where an inclined plane is wrapped around a cylinder.  The mechanical advantage created by a screw is based on the closeness of the threads of a screw.  A mechanical advantage is when an input force is amplified by the use of a tool.  

In order to calculate the mechanical advantage of a screw, take the length of the threads divided by the length of the screw.

Ideal Mechanical Advantage = Length of Threads / Length of Screw

Example:

If the length of the threads of a screw are 6cm long and the length of a screw is 3cm long, what is the mechanical advantage of the screw?

 

Length of Threads = 6cm

Length of Screw = 3cm

 

Ideal Mechanical Advantage = Length of Threads / Length of Screw

Ideal Mechanical Advantage = 6cm / 3cm

Ideal Mechanical Advantage = 2

 

The screw in our example is able to amplify the input force by two times.