Start Free Mock LoginAlready registered? Login here

Physics - Rotation Question with Solution | TestHub

PhysicsRotationRotational KinematicsMedium2 minQB

PhysicsMediumsingle choice

Two particles P and Q are located at distances $r_{P}$ and $r_{Q}$ respectively from the centre of rotating disc such that $r_{P} > r_{Q}$ . The disc is rotating with constant angular acceleration. We can say :-

Options:

Answer:

Solution:

Both particles have the same angular speed and angular acceleration.

$a_{r} = ω^{2} r$

$a_{t} = α r$

$∣ a ∣ = r ω^{4} + α^{2}$

Since P is farther from the centre, its acceleration is greater.

$r_{P} > r_{Q} \Rightarrow a_{P} > a_{Q}$

Option C.

Stream:JEESubject:PhysicsTopic:RotationSubtopic:Rotational Kinematics

⏱ 2mℹ️ Source: QB

Doubts & Discussion

Loading discussions...