A person of mass 50 kg stands on a weighing scale on a lift. If the lift is descending with a downward acceleration of 9 m/s2 . What would be the reading of weighing scale?

Asked by Last Modified  

4 Answers

Learn Physics

Follow 3
Answer

Please enter your answer

A Retired Physics Teacher for NEET JEE, Board

Mg-N = Ma N=M(g-a) Where N= apparent weight or the reading on the weighing machine N= 50(9.8-9) =50×.,8 newton = 40/9.8 kg = 12newton
Comments

Mg(downward) - ma(pseudo force upward ) =weighing machine reading 50N-45N =5N( answer)
1 Comments

Tutor

Mass of the person, m = 50 kgDescending acceleration, a = 9 m/${{s}^{2}}$Acceleration due to gravity, g = 10 m/${{s}^{2}}$ Apparent weight of the person,R = m(g-a) =50(10-9) = 50N .’. Reading of the weighing scale =R/g =50/10 = 5 kg
Comments

Awarded as a Best Physics Teacher from IIT

Since lift is descendin so the downward force (i.e.weight) is greater than upward reactionary force so mg-R=m a R=m(g-a) R=50(9.8-9) R=50(0.8) R=40 N So the reading of weighing scale is =40/9.8 =4.08kg
read more
Since lift is descendin so the downward force (i.e.weight) is greater than upward reactionary force so mg-R=m a R=m(g-a) R=50(9.8-9) R=50(0.8) R=40 N So the reading of weighing scale is =40/9.8 =4.08kg read less
Comments

View 2 more Answers

Related Questions

What is the best way to master physics?
The best way to master Physics is firstly to understand concepts at a deeper level. Then find out its applications, especially observing the things related to day to day life. For example, when you place...
Profile Photo
Aparna
0 0
View Comments5
Does a feather fall faster towards the ground in vacuum than in air?
Yes in any vacuum place only gravitational force will work on it and there won't be any air to stop it from falling faster.
Profile Photo
Ramit
0 0
View Comments8
Can you add three unit vectors to get a unit vector? Does the answer change if two unit vectors are along coordinate axis? Please give example.
If two unit vector in same direction (along),third unit vector in opposite direction situated after applying law's of vector addition along coordinate we will gate unit vector..which is result of three...
Profile Photo
Deepika T.
0 0
View Comments6

Now ask question in any of the 1000+ Categories, and get Answers from Tutors and Trainers on UrbanPro.com

Ask a Question

Related Lessons



Pressure of a liquid
A

Arnab Bhattacharjee

0 0
View Comments0


Electrostatic and Magnetism_lesson1
State true or False: 1. The intensity of the electric field decreases as you go away from the centre of a uniformly charged solid sphere. 2. The angle between the positive normal of a current loop and...
A

Abdul Aziz

0 0
View Comments0

Recommended Articles

While schools provide formal education to the children, the home is where they start learning about things informally. Parents think that schools will take the initiative to educate their children. Well, this is partially true, as parents also play an essential role in bringing up their child. For the development of particular...

Read full article >

E-learning is not just about delivering lessons online. It has a much broader scope that goes beyond manual paper or PowerPoint Presentations. To understand the reach of E-learning and how the whole process works in developing the Educational system, we will discuss a few points here. Let us find out how this new learning...

Read full article >

With the current trend of the world going digital, electronic renaissance is a new movement that is welcomed by the new generation as it helps makes the lives of millions of people easier and convenient. Along with this rapidly changing movement and gaining popularity of Internet, e-Learning is a new tool that emerging...

Read full article >

Appearing for exams could be stressful for students. Even though they might have prepared well, they could suffer from anxiety, tension etc. These are not good for their health and mind. However, following a few exam preparation tips can save them from all these and help them to score good marks. Let’s find out all...

Read full article >

Looking for Class 11 Tuition ?

Learn from the Best Tutors on UrbanPro

Are you a Tutor or Training Institute?

Join UrbanPro Today to find students near you