Start Free Mock LoginAlready registered? Login here

Physics - Rotation Question with Solution | TestHub

PhysicsRotationRotational KinematicsEasy2 minPYQ_2020

PhysicsEasysingle choice

A flywheel of the moment of inertia $0.4 k g m^{2}$ and radius $0.2 m$ is free to rotate about a central axis. If a string is wrapped around it and it is pulled with a force of $10 N$ , then its angular velocity after $4 s$ will be

Options:

Answer:

Solution:

$F \times r = I α = I \frac{(ω_{2} - ω_{1})}{t}$

$∴ ω_{2} - ω_{1} = \frac{F \times r \times t}{I}$

$= \frac{10 \times 0.2 \times 4}{0.4} = 20 r a d s^{- 1}$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:RotationSubtopic:Rotational Kinematics

⏱ 2mℹ️ Source: PYQ_2020

Doubts & Discussion

Loading discussions...