Rotational MotionHard
Question
A coin placed on a rotating table just slips if it is placed at a distance 4r from the centre. On doubling the angular velocity of the table, the coin will just slip when at a distance from the centre equal to:-
Options
A.
B.
C.r
D.4r
Solution
The coin will slip from the table when the inertial force mrω2 is greater or equal to the static force of friction mg.
mrω2 ≥ μmg
r ≥
From here r ∝
∴
= 4
⇒ r2 =
= r
mrω2 ≥ μmg
r ≥
From here r ∝
∴
= 4⇒ r2 =
= rCreate a free account to view solution
View Solution FreeMore Rotational Motion Questions
A disc rolls down a plane of length L and inclined at angle θ, without slipping. Its velocity on reaching the botto...In the following figure r1 and r2 are 5 cm and 30 cm respectively. If the moment of inertia of the wheel is 5100 kg-m2 t...The moment of inertia of a ring of mass M and radius R about PQ axis will be :-...A body is rolls on a rough curved surface with an initial speed v as shown in the figure if the body undergoing pure rol...The moment of inertia of a square loop made of four uniform solid cylinders, each having radius R and length $L(R < L...