A uniform disc of mass 0.5 kg and radius r is projected with velocity 18 m s⁻¹ at t = 0 on a rough horizontal surface. It starts with purely sliding motion. After 2 s it acquires pure rolling. The total kinetic energy of the disc after 2 s will b e ______ J. [Coefficient of friction = 0.3, g = 10 m s⁻²]
Physics · Rotational Motion · combined translatory and rotatory motion ,Pure rolling motion
A uniform disc of mass 0.5 kg and radius r is projected with velocity 18 m s⁻¹ at t = 0 on a rough horizontal surface. It starts with purely sliding motion. After 2 s it acquires pure rolling. The total kinetic energy of the disc after 2 s will be ______ J. [Coefficient of friction = 0.3, g = 10 m s⁻²]
