The system consisting of objects with mass ma = 1 (kg), mB = 2 (kg) and massless and frictionless pulleys and ropes is as shown in the figure. At t= 0, the force F = 10t (N) starts pulling the middle...

Extracted text: The system consisting of objects with mass ma = 1 (kg), mB = 2 (kg) and massless and frictionless pulleys and ropes is as shown in the figure. At t= 0, the force F = 10t (N) starts pulling the middle pulley upwards. Find the velocity of object A in (m/s) when the object B loses contact with the ground? g = 10 (m/s²) F = 10t B A) 5 B) 40 С) 10 D) 20 E) 90