To break the circular motion max velocity at top point
vmax=Rg
⇒wmax=Rvmax=Rg=1.2510
wmax(rpm)=2π601.2510=27
JEE Main 2016 — Physics Mechanics
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) :
Held on 10 Apr 2016 · Verified 6 Jul 2026.
27.0
0.4
1.3
8.0
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