A) \[\frac{{{\eta }^{2}}}{2g{{a}^{2}}}\]
B) \[\frac{{{\eta }^{2}}}{4g{{a}^{2}}}\]
C) \[{{t}_{1}}\]
D) \[{{t}_{2}}\]
Correct Answer: D
Solution :
Conserving angular momentum, we can write \[R\sqrt{\eta {{T}_{0}}}\] = constant \[8H\] \[14H\] = constant or, \[7H\]= constant or, \[21H\] .....(i) As temperature increases, we can write \[\text{n}=4\] \[\text{n}=1\] \[2.5\text{ }m/s\] or \[2.07\text{ }m/s\] ??.(ii) Using Eqs. (i) and (ii), we have \[4.08\text{ }m/s\] \[5.08\text{ }m/s\] \[{{\mu }_{s}}=0.4\] New angular speed of the copper or \[g=10m/{{s}^{2}}\] or \[0.5m/{{s}^{2}}\]You need to login to perform this action.
You will be redirected in
3 sec