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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > A uniform disc of mass m = 1 kg and radius R = 20 cm lies flat on a smooth horizontal table. A mass less string runs halfway around it as shown ion fig. One end of the string is attached to a small block of mass m and the other end is being pulled with a force F = 20 N . The circumference of the disc is sufficiently rough so that the string does not slip over it. Find acceleration of the small block ( in m/s^2).

A uniform disc of mass m = 1 kg and radius R = 20 cm lies flat on a smooth horizontal table. A mass less string runs halfway around it as shown ion fig. One end of the string is attached to a small block of mass m and the other end is being pulled with a force F = 20 N . The circumference of the disc is sufficiently rough so that the string does not slip over it. Find acceleration of the small block ( in m/s^2).

A rolling body of mass m = 4 k g radius R and radius of gyration k = R / √ 3 is placed as a plank which moves with an acceleration a 0 = 1 m /s^2 . Find the frictional force acting on the body if it rolls without sliding(in N ).