Chapter 7 - Circular Motion and Gravitation - Learning Path Questions and Exercises - Exercises - Page 261: 25

a). Angular speed =$\frac{\Delta \theta}{\Delta t}=\frac{0.61}{1.2}=0.5rad/s$ Tangential speed =$v=r\omega=0.41\times0.5=0.205m/s$ b). $\omega=0.5 rad/s$ Tangential speed =$r\omega=0.015\times0.5=0.0075m/s$ c). Both the pebble and the grease will have their angular velocities in the counter-clockwise direction.

a). Angular speed =$\frac{\Delta \theta}{\Delta t}=\frac{0.61}{1.2}=0.5rad/s$ Tangential speed =$v=r\omega=0.41\times0.5=0.205m/s$ b). $\omega=0.5 rad/s$ Tangential speed =$r\omega=0.015\times0.5=0.0075m/s$ c). Both the pebble and the grease will have their angular velocities in the counter-clockwise direction.