CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon


Question

An effort of 240 N overcome a useful load 1000 N when applied to a block and system of pulleys; such that the weight of movable block and friction is 220 N. What is the efficiency of the system?
  1. 81.2%
  2. 82.5%
  3. 83.4%
  4. 84%


Solution

The correct option is C 83.4%
Given:
Load = 1000 N 
Effort = 240 N , and
Weight of the block and friction = 200 N 

Mechanical advantage =LoadEffort=1000240=4.17

Velocity Ratio = Ideal mechanical advantage

=Resistance overcomeEffort

=Useful load other forceEffort

=1000+200240=1200240=5

Efficiency =M.A.V.R×100=4.175×100=83.4%

flag
 Suggest corrections
thumbs-up
 
0 Upvotes


Similar questions
QuestionImage
QuestionImage
View More...



footer-image