A thin solid disk of mass 1 kg is rotating along its diameter axis at the speed of 1800 rpm. An external torque of 25π Nm is applied for 40 seconds, increasing the speed to 2100 rpm. Find the diameter of the disk.
⚙️ A Thin Rotating Disk – Torque & Diameter Problem | Doubtify JEE 📌 Question: A thin solid disk of mass 1 kg is rotating along its diameter axis at the speed of 1800 rpm . An external torque of 25π Nm is applied for 40 seconds , increasing the speed to 2100 rpm . Find the diameter of the disk. 📸 Question Image: