Question 36
A solid sphere and a hollow cylinder of same mass and radius are subjected to same torque. Which one will have greater angular speed after same time?
Question 37
An oxygen molecule has mass 5.30×10⁻²⁶ kg and moment of inertia 1.94×10⁻⁴⁶ kg·m² about an axis through its center perpendicular to the line joining atoms. If rotational KE is two-thirds of translational KE and mean speed is 500 m/s, what is average angular velocity?
Question 38
A metre stick is balanced at its center initially. Two 5 g coins are placed at 12.0 cm mark, and the new balance point is at 45.0 cm. What is the mass of the stick?
Question 39
From a uniform disk of radius R, a circular hole of radius R/2 is removed. The center of the hole is at R/2 from the center of the original disk. Where is the center of mass of the remaining body?
Question 40
To maintain a rotor at 200 rad/s, an engine transmits a torque of 180 N·m. What is the power delivered by the engine? Assume 100% efficiency.