MCQOPTIONS
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| 1. |
A skater weighing 1000 N skates at a speed of 20 m/s on ice maintained at \[0{}^\circ C.\] the average skating area supporting the skater is \[0.001\,{{m}^{2}}\] and the coefficient of friction between the skatesandice is 0.02. What will be the average thickness of a film of water existing at the interface between the skater and ice? (Take dynamic viscosity of water as \[0.001\,\text{Ns/}{{\text{m}}^{\text{2}}}\]) |
| A. | \[{{10}^{-5m}}\] |
| B. | \[{{10}^{-6}}\] |
| C. | \[{{10}^{-2}}\] |
| D. | Not possible to estimate since there cannot be a possibility, of formation of a thin film of water at interface |
| Answer» B. \[{{10}^{-6}}\] | |