How can I accurately measure the force applied to my door to calculate its mass?

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SUMMARY

This discussion focuses on accurately measuring the force applied to a wooden door to calculate its mass using torque and angular acceleration formulas. The user considers using a spring balance to measure force based on Hooke's law and explores the concept of simple harmonic oscillation to determine mass without directly measuring force. The discussion emphasizes the importance of rotational inertia and neglects friction from well-oiled hinges. The user expresses a personal interest in physics as a hobby.

PREREQUISITES
  • Understanding of torque and angular acceleration formulas
  • Knowledge of Hooke's law and spring balance mechanics
  • Familiarity with simple harmonic motion principles
  • Basic concepts of rotational inertia
NEXT STEPS
  • Research the principles of simple harmonic oscillation in detail
  • Learn about the design and calibration of spring balances
  • Explore methods for calculating rotational inertia of non-uniform objects
  • Investigate the application of dynamometers in force measurement
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Physics enthusiasts, hobbyists exploring mechanics, and students studying rotational dynamics will benefit from this discussion.

yasar1967
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I am trying to calculate the mass of my wooden room door without taken them off their hinges using the torque and angular acceleration formulas.
I have ang. acc. (how much time passed calculated when door passed certain radian by certain push from me).
Rotational inertia is calculated by treating the door as flat area (metal locking has been taken into consideration -but not the friction force from hinges, I guess they're well oiled and fraction can be neglected, right?)

The problem is the force I applied. How can I measure it accurately?
If I could find a way to do it I can easily measure the door's mass.

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How about a spring balance?
 
elaborate please
 
Look it up. It's a spring with some form of attachment at either end and a calibrated gauge in the middle to show how much the spring is stretched (hence reading off the force via Hooke's law).
 
there is a way to measure the mass of the door without measuring force. however, it still requires a strong spring:

Simple Harmonic oscillation.

you just need to know k, and then count the period!
 
taking the door off the hinges and putting it on a weight scaler would be easier perhaps but that's NOT the point, this method can be applied to situations where no other way of calculation is possible. Besides, it's fun.
 
Why do you want to do this determination? Is it for a school project?
 
I study Physics at leisure. It's my hobby. Solving problem and contemplating about the world we live in makes me feel good, that's all.
 

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