A space $2.5\ cm$ wide between two large plane surfaces is filled with oil. Force required to drag a very thin plate of area $0.5\ m^2$ just midway the surfaces at a speed of $0.5\ m/sec$ is $1\ N$. The coefficient of viscosity in $kg-s/m^2$ is
A space $2.5\ cm$ wide between two large plane surfaces is filled with oil. Force required to drag a very thin plate of area $0.5\ m^2$ just midway the surfaces at a speed of $0.5\ m/sec$ is $1\ N$. The coefficient of viscosity in $kg-s/m^2$ is
- A
$5 \times {10^{ - 2}}$
- B
$2.5 \times {10^{ - 2}}$
- C
$1 \times {10^{ - 2}}$
- D
$7.5 \times {10^{ - 2}}$
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