Simple Machines• Make work easier• Many are similar (are cousins of  each other)• Can be put together= compound  machine
How do they make work          easier?1. By changing force needed to move   something2. By changing the direction of the  ...
Mechanical Advantage• The amount the force gets multiplied  by a machine• It is a ratio so it has no units• Formula= Resis...
Do machines allow you to multiply             work?• Work= energy• Energy can not be multiplied, just used• Efficiency com...
Perpetual Motion?• Perpetual means foreverhttp://www.kilty.com/pmotion.htm
Upcoming SlideShare
Loading in …5
×

Simple machines

389 views

Published on

Published in: Education, Technology, Business
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total views
389
On SlideShare
0
From Embeds
0
Number of Embeds
1
Actions
Shares
0
Downloads
2
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

Simple machines

  1. 1. Simple Machines• Make work easier• Many are similar (are cousins of each other)• Can be put together= compound machine
  2. 2. How do they make work easier?1. By changing force needed to move something2. By changing the direction of the force3. Or by doing both4. By changing the speed at which work is done
  3. 3. Mechanical Advantage• The amount the force gets multiplied by a machine• It is a ratio so it has no units• Formula= Resistance (output) force divided by Effort (input) Force
  4. 4. Do machines allow you to multiply work?• Work= energy• Energy can not be multiplied, just used• Efficiency compares work output to work input• If they are efficient they _________?• If they are not efficient (inefficient) they__?
  5. 5. Perpetual Motion?• Perpetual means foreverhttp://www.kilty.com/pmotion.htm

×