30 points
>
>
>
>
Time management is very much important in IIT JAM. The eduncle test series for IIT JAM Mathematical Statistics helped me a lot in this portion. I am very thankful to the test series I bought from eduncle.
Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
- IIT JAM
- Physics (PH)
General doubt,
why we are standing still in a weight machine to measure correct reading,why the reading changes if we bend our head?
3 Answer(s)
Answer Now
- 0 Likes
- 4 Comments
- 0 Shares
-
![comment-profile-img]()
>
-
![comment-profile-img]()
>
Ruby negi
weight will not change when we bend our head because weight is simply mass multiplied by acceleration due to gravity between our feet and weighing machine..
-
![comment-profile-img]()
>
Abhishek singh
![best-answer]()
if you bend your head such that centre of mass of your body is still above the weighing machine, then there would be no significant change. but if centre of mass is shifted such that it is no longer above the weighing machine, then it will measure your weight with some error.
-
![comment-profile-img]()
>
Dhairya sharma Best Answer
it's depending on the centre of mass. if we move any body part cm shifts then reading changes in fraction of time after that it's reading stable.
Do You Want Better RANK in Your Exam?
Start Your Preparations with Eduncle’s FREE Study Material
- Updated Syllabus, Paper Pattern & Full Exam Details
- Sample Theory of Most Important Topic
- Model Test Paper with Detailed Solutions
- Last 5 Years Question Papers & Answers
Sign Up to Download FREE Study Material Worth Rs. 500/-
Shanu arora![best-answer]()
When you body part is moving head ,hand or anything ,your centre of mass is in motion and bcz of this the normal for acting on your body will not be equal to you weight . Remember the weighing machine doesn't actually measure your weight it measures the reaction of normal force acting on your body. Remember the lift weighing machine problem we used to solve in High school physics. This is essentially the same. The difference is their the object is considered as a point object for simplicity so we have to move the objects up and down in a lift to vary the reading In the weighing machine an extended object like our human body is in motion if it is centre of mass is in motion. So when you move your head up and down it's like your whole body is moving up and down in a lift. feel free for any doubts.