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In a death well, a person drives a bicycle or a motor cycle on the vertical surface of a large wooden well. The walls of death well are at rest. In death well friction balances the weight of the person while reaction of the wall provides the centripetal force necessary for circular motion. Balancing the vertical forces we get, fmax=μN=μmv^2/r For him not to fall; fmax≥mg⇒μmv^2/r≥mg ⇒v≥√gr/μ ∴ vmin=√gr/μ
@@sharathgoresir I had asked query about v max, and you answered about v min. Kindly go through my query once again, and if possible, let me know the solution for vmax when theta = pi/2.
@@sharathgoresir When I'm putting theta = 90 degrees in the expression for vmax, it is giving an imaginary number. How's that possible. and what does it signify.?
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Go through the link below to get video and text solutions of Important questions, video solutions and text solutions for your midterm and annual board exams 👇
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Thankkkk godddd i was finding derivation of this i watched a ton pf videos but didn't understood then i came across here u teached very nicelyyy thankuuu sir love from shimla😇
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What will be vmax when theta = 90 degrees, as happens in the well of death in a circus performance.?
In a death well, a person drives a bicycle or a motor cycle on the vertical surface of a large wooden well. The walls of death well are at rest.
In death well friction balances the weight of the person while reaction of the wall provides the centripetal force necessary for circular motion.
Balancing the vertical forces we get,
fmax=μN=μmv^2/r
For him not to fall;
fmax≥mg⇒μmv^2/r≥mg
⇒v≥√gr/μ
∴
vmin=√gr/μ
@@sharathgoresir I had asked query about v max, and you answered about v min. Kindly go through my query once again, and if possible, let me know the solution for vmax when theta = pi/2.
@@AK56fire velocity can be anything above v minimum 🙏
@@sharathgoresir When I'm putting theta = 90 degrees in the expression for vmax, it is giving an imaginary number. How's that possible. and what does it signify.?
@@AK56fire that means you can go with very very very high velocity also (infinite)
Why frictional force didn't act upward
Frictional force is always parallel to the surface of contact and opposes motion.
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shouldn't we divide on the both sides???
Yeah. It get cancelled.
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Sir why we divide this with cos teeta
to make a better answer or to uniform sin , cos terms into tan
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Why Nas taken mg
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