A weight on two strings
"A weight on two strings" is a free, interactive Class 11 Physics simulation for NEET and JEE, built on the NCERT section "Equilibrium of a particle" in Laws of Motion. A weight hung from two strings at adjustable angles; the tensions resolve into components and close a force triangle. NEET has asked about this idea 1 time in 10 years of papers. JEE Main asked 39 questions from this chapter across the 42 shifts Lumi has analysed (2017–2026).
From the lesson Equilibrium of a particle in Laws of Motion. Change the values and watch what happens.
What it shows
NCERT § Equilibrium
A weight hung from two strings at adjustable angles; the tensions resolve into components and close a force triangle.
Controls
3 to try
- Draganchor points of both strings
- Sliderweight 10–200 N
- ReadoutT₁, T₂ and the closed triangle
Try this
Find the symmetric angle at which each string's tension equals the weight (120° between strings).
Common mistake
Assuming each string carries half the weight regardless of angle.
In NEET
10 years of papers
Asked 1 time in 10 years of NEET.
See the past questions: Newton's Laws of Motion, Laws of Motion (chapter)
In JEE Main
42 shifts analysed
39 questions from Laws of Motion across the 42 JEE Main shifts Lumi has analysed (2017–2026).
The idea behind it
NCERT § "Equilibrium of a Particle"
- A particle is in equilibrium when the net external force on it is zero; it is then at rest or in uniform motion.
- Two forces keep a particle in equilibrium only if they are equal in size and opposite in direction.
- Three concurrent forces in equilibrium add to zero and can be drawn head to tail as a closed triangle.
- In practice, resolve every force along two perpendicular axes and set the sum of components along each axis to zero.
- A mass hanging from two strings is the standard case: the vertical components of the tensions together balance the weight, and the horizontal components cancel.
Questions
5 answers
- What does the "A weight on two strings" simulation show?
- A weight hung from two strings at adjustable angles; the tensions resolve into components and close a force triangle.
- What mistake does the "A weight on two strings" simulation fix?
- A common mistake it clears up: assuming each string carries half the weight regardless of angle.
- Has NEET asked about this idea?
- Yes. NEET has asked about this idea 1 time in 10 years of papers.
- Does JEE Main ask questions from Laws of Motion?
- Yes. JEE Main asked 39 questions from this chapter across the 42 shifts Lumi has analysed (2017–2026).
- Is this simulation free?
- Yes. It is free and runs in the browser on a phone or a laptop. It belongs to the lesson "Equilibrium of a particle" in Laws of Motion (Class 11 Physics).
Embed this simulation
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