A 4 kg block lies on a rough horizontal table and is connected by a light string over a smooth pulley to a hanging 2 kg block. Coefficient of kinetic friction between 4 kg block and table is 0.25. Take g = 10 m/s². Acceleration of the system is:
Options

Question

A 4 kg block lies on a rough horizontal table and is connected by a light string over a smooth pulley to a hanging 2 kg block. Coefficient of kinetic friction between 4 kg block and table is 0.25. Take g = 10 m/s². Acceleration of the system is:

Options

G1 Physics · Accepted Answer

Friction on 4 kg block = μmg = 0.25×4×10 = 10 N. Driving force = 2g - 10 = 20-10 = 10 N. Total mass = 6 kg. Thus a = 10/6 = 5/3 m/s².