Explore everything we offer students and teachers

Explore all of our learning and teaching solutions

Got a Kanye-sized ego? → Test it on our Ego-Meter
+
3 Tutorials that teach Mechanical Efficiency
Take your pick:
Mechanical Efficiency

Mechanical Efficiency

Author: Nathan Lampson
Objective:

Machines aren't perfect. Learn about outside factors, such as friction or building material, that can influence a machine's ideal mechanical advantage. Discover how to use input and output forces required to perform a task to calculate the mechanical efficiency of a machine. By understanding the the engineering of machines, you will be prepared to apply your knowledge to the real world.

(more)
See More
Test Yourself

Show your understanding of this concept by correctly answering 3 questions.

Got it
Tutorial

Machines aren't perfect -- not even close -- if you'd like to measure the efficiency of a machine, you can calculate it. There are all sorts of factors affecting the efficiency of machines, things like friction and the materials the machine is made from.

Efficiency is measured as a percentage. If a fixed pulley with a mechanical advantage of 1 is used to lift a crate, the input force should be exactly equal to the output force. External factors can influence the ideal mechanical advantage of the pulley.

With the fixed pulley, the crate being lifted required 6 Newtons of input force. The actual output force of the fixed pulley is 3 Newtons of force. To calculate the efficiency of the fixed pulley, use the equation:

Efficiency = Output Force / Input Force x 100

Input Force = 6 Newtons

Output Force = 3 Newtons

Efficiency = 3 Newtons / 6 Newtons x 100

Efficiency =50%

Questions and Answers

Academic Reviews
SOPHIA has reviewed the tutorial and found it academically sound.
Human Biology

No bones about it.
Our Human Biology course is only $329.

Sophia's online courses not only save you money, but credits are also eligible for transfer to over 2,000 colleges and universities.*