JEE Main 2016PhysicsRotational MotionCombined Translational And Rotational MotionmediumMCQ

JEE Main 2016 — Rotational Motion Question with Solution

From: JEE Main 2016 (Online) 10th April Morning Slot

Question

Concrete mixture is made by mixing cement, stone and sand in a rotating cylindrical drum. If the drum rotates too fast, the ingredients remain stuck to the wall of the drum and proper mixing of ingredients does not take place. The maximum rotational speed of the drum in revolutions per minute(rpm) to ensure proper mixing is close to :

(Take the radius of the drum to be 1.25 m and its axle to be horizontal) :

Choose an option

Show full solutionCorrect option: D
Correct answer
D27.0

Step-by-step explanation

For proper mixing, the concrete mixture should not stick to the top wall of the cylinder and it should fall down.

JEE Main 2016 (Online) 10th April Morning Slot Physics - Rotational Motion Question 193 English Explanation

The maximum velocity at the top is v, then we have

Therefore, the maximum rotational speed of the drum is

rad/s

rpm = 26.74 27 rpm

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About this question

This is a previous-year question from JEE Main 2016, covering the Rotational Motion chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.