Student Login

Home›Chapters›Rotational Motion PYQs›Rotational Kinematics & Dynamics›Question 1

MHT CET 2026 (11 Apr, Shift 1) · Rotational Kinematics & Dynamics

Rotational Kinematics & Dynamics question from MHT CET 2026 (11 Apr, Shift 1)

Q1MHT CET 2026 · 11 APR · SHIFT 1Easy

Rotational Kinematics & Dynamics

A wheel is rotating at $600$ rpm about its axis of rotation. When the power is cut off, it comes to rest in half a minute. Its angular retardation expressed in rad $/\text{s}^{2}$ is (retardation is uniform)

Show answer and solution

Answer: (a)

$\omega_0 = 600$ rpm $= \frac{600 \times 2\pi}{60} = 20\pi$ rad/s, $t = 30$ s, $\omega = 0$
$\alpha = \frac{\omega_0}{t} = \frac{20\pi}{30} = \frac{2\pi}{3}$ rad/s $^2$
So the answer is (a) $\frac{2\pi}{3}$ .

Report a mistake

More questions on Rotational Kinematics & Dynamics

The angular speed of a flywheel is increased from 600 rpm to 1200 rpm in 10 s. The number…NEET 2026
A disc of radius 0.4 m and mass 1 kg rotates about an axis passing through its centre and…MHT CET 2026 (13 Apr, Shift 1)
A wheel initially at rest is subjected to a uniform angular acceleration about its axis…JEE Main 2026 (5 Apr, Shift 2)
A disc of mass 100 kg and radius 1 m is rotating at 300 r.p.m. The torque required to…MHT CET 2026 (12 May, Shift 2)
A solid sphere of radius 4 cm and mass 5 kg is rotating (rotation axis is passing through…JEE Main 2026 (6 Apr, Shift 1)
A fly wheel having mass 3 kg and radius 5 m is free to rotate about a horizontal axis. A…JEE Main 2026 (28 Jan, Shift 2)
Two masses m and 2 m are connected by a light string going over a pulley (disc) of mass…JEE Main 2026 (22 Jan, Shift 2)
Two masses 400 g and 350 g are suspended from the ends of a light string passing over a…JEE Main 2026 (24 Jan, Shift 1)