Quantcast

Mechanical Advantage

Join BeMo MCAT MasterMind Club®
This forum made possible through the generous support of SDN members, donors, and sponsors. Thank you.

MedPR

Membership Revoked
Removed
Joined
Dec 1, 2011
Messages
18,579
Reaction score
52
I feel like this is such a simple topic, but I just can't get a good grasp on it. John (that's the wikipremed guy's name, right?) did a pretty thorough explanation in the video but I still don't understand. To take a page out of SaintJude's book, the answer is here in white: A

t8Det.jpg
 

dsoz

Accepted OHSU C/O 2017
5+ Year Member
Joined
Apr 8, 2011
Messages
1,578
Reaction score
33
Pulley has a MA=3 because it has 3 support strings (don't count the one that pulls DOWN on the far right, only count the 3 strings on the left that are supporting the mass at the bottom.

Lever has a MA=2 because the Din/Dout ratio is 2/1

ramp with pulley has MA = 1.41 (or sqare root of 2) because of the 45 degree angle.

dsoz
 

AFLATPEG

Full Member
Joined
Mar 28, 2013
Messages
86
Reaction score
0
Pulley has a MA=3 because it has 3 support strings (don't count the one that pulls DOWN on the far right, only count the 3 strings on the left that are supporting the mass at the bottom.

Lever has a MA=2 because the Din/Dout ratio is 2/1

ramp with pulley has MA = 1.41 (or sqare root of 2) because of the 45 degree angle.

dsoz


isnt the inclined plane MA = 1/sin(theta) ?
 
Top