The coefficient of friction between 20 kg and ground, between 10 kg and 20 kg and between 30 kg and 40 kg is 0.2. No friction is present between 40 kg block and ground. A constant force F has been applied on 40 kg mass. The friction force between 10 kg and 20 kg is fR1 and friction force between 30 kg and 40 kg mass is fR2. It is given that \(2f_{R_1}=f_{R_2}\).
Acceleration of 10 kg block
