A small body
A starts sliding down from the top of a wedge as shown in figure above, whose base is equal to
l=2.10m. The coefficient of friction between the body and the wedge surface is
k=0.140. At what value of the angle
α will the time of sliding be the least?
![129736.png](https://search-static.byjusweb.com/question-images/toppr_ext/questions/129736.png)