Question

1................is defined as the shear stress required to produce unit rate of shear strain.. Single choice.

Kinematic viscosity

Specific gravity

Viscosity

Specific density

2.A plate 0.025 mm distant from a fixed plate, moves at 60 cm/s and requires a force of 3 N/m2 to maintain this speed.what is the fluid viscosity between the plates ?
0.000012 Ns/m2
0.00012 Ns/m2
0.012 Ns/m2
0.0012 Ns/m2
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Answer 1

1. viscosity is defined as the shear stress required to produce unit rate of shear strain.

2.dy = 0.025 mm = 0.025 × 10-3m Velocity of upper plate . = 60 cm/s = 0.6 m/s Force on upper plate = 2(N/m2) = Shear stress, τ du = change of velocity = u – 0 = 0.6 m/s dy = change of distance = 0.025 × 10-3m Viscosity, 8.33 × 10-5 (Ns/m2) = 8.33 × 10-5 PasRead more on Sarthaks.com - https://www.sarthaks.com/620780/plate-025-distant-from-fixed-plate-moves-and-requires-force-per-meter-square-maintain-speed