A solid block of 2.0 kg mass slides steadily at a velocity

A solid block of 2.0 kg mass slides steadily at a velocity Valong a vertical wall as shown in the figure below. A thin oil film of thickness h = 0.15 mm provides lubrication between the block and the wall. The surface area of the face of the block in contact with the oil film is 0.04 m². The velocity distribution within the oil film gap is linear as shown in the figure. Take dynamic viscosity of oil as 7 × 10_-3 Pa-s and acceleration due to gravity as 10 m/s². Neglect weight of the oil. The terminal velocity V (in m/s) of the block is __________(correct to one decimal place).

Terminal velocity is a constant velocity i.e. the net acceleration is zero.
So, ΣF_net = ma
mg – τA = 0
τA = mg

μ	V	A = mg
	h

7 × 10^-3 ×	V	× 0.04 = 2 × 10
	0.15 × 10^-3

V = 10.714 m/s