See image — AITS & Test Series Chemistry Question

💡 Solution & Explanation

Sol. (Q.14 & 15) Since velocity is constant, Fnet = 0  R v l B ilB mg 0 2 2          R Blv R i 0  On solving we get, m = 1 kg Now, when mass is tripled ma T mg 3 3   and ma R v l B T   2 2 On solving, ma R v l B mg 4 3 2 2   … (i) Now, Tv v  when a = 0    2 2 3 l B mgR vT 30 m/s Question Stem for Question Nos. 16 and 17 Question Stem A solid cylinder of mass m and radius R is kept at rest on a plank of mass 2m lying on a smooth horizontal surface. Massless and inextensible string connecting cylinder to the plank is passing over a massless pulley. The friction between the cylinder and the plank is sufficient to prevent slipping. Pulley A is pulled with a constant horizontal force F.[F =100N, m = 1kg] F A 2m m R