A) \[\sqrt{3}:2\]
B) \[1:\sqrt{3}\]
C) 1 : 5
D) 5 : 1
Correct Answer: D
Solution :
Let the common acceleration of the system of masses is a Then, for mass 12 kg \[0=v-at\] ...(i) And for the mass 3 kg \[\therefore \] ...(ii) Put the value of \[-a=\frac{0-v}{t}=-\frac{v}{t}\] from Eq. (ii), in \[f=\mu R=\mu mg\] (i) \[a=\mu g\] \[\therefore \] \[t=\frac{v}{a}=\frac{v}{g\mu }\] \[\eta =\frac{{{P}_{0}}}{{{P}_{i}}}\] \[\therefore \]
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