Start Free Mock LoginAlready registered? Login here

Physics - Rotation Question with Solution | TestHub

PhysicsRotationRotational KinematicsMedium2 minPYQ_2021

PhysicsMediumsingle choice

A particle at rest starts moving with a constant angular acceleration of $4 rad / s^{2}$ in a circular path. At what time the magnitude of its centripetal acceleration and tangential acceleration will be equal

Options:

Answer:

Solution:

$α = 4 rad / s^{2} Centripetal (radial) acceleration, a_{r} = r ω^{2} Tangential acceleration, a_{t} = r α If a_{r} = a_{t}, then r ω^{2} = r α ω = α = 2 rad / s ω = ω_{0} + α t = 0 + α t = α t or t = \frac{ω}{α} = \frac{1}{2} sec$

Stream:MHT_CETSubject:PhysicsTopic:RotationSubtopic:Rotational Kinematics

⏱ 2mℹ️ Source: PYQ_2021

Doubts & Discussion

Loading discussions...