Online College Courses for Credit

Using Machines

Using Machines


SWBAT explain how a machine makes work easier.

SWBAT calculate the mechanical advantage and efficiency of a machine. 

SWBAT explain how friction reduces efficiency. 

Machines can't change the amount of work you need to do, but they can make doing work easier. 

See More
Fast, Free College Credit

Developing Effective Teams

Let's Ride
*No strings attached. This college course is 100% free and is worth 1 semester credit.

29 Sophia partners guarantee credit transfer.

311 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 27 of Sophia’s online courses. Many different colleges and universities consider ACE CREDIT recommendations in determining the applicability to their course and degree programs.




input force 

output force

mechanical advantage


Mechanical Advantage - Pulleys

Explanation of force, Newtons, and mechanical advantage of simple machines in the context of pulleys.

Pulleys - Simple Machines

Fixed and movable pulleys

Eureka! Episode 13 - Mechanical Advantage and Friction

Cartoon comparing the efficiency of inclined planes and levers in the context of friction.