Physics · 2016
JEE Main · 10 April 2016, Shift 1 · Q3
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…
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 $\displaystyle 1.25$ m and its axle to be horizontal) :
Official answer
(4)
$\displaystyle 27.0$
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JEE Main 2016 Physics question, with the answer from NTA’s final answer key. Where our answers come from.