7 A semi cylindrical groove of radius r 20 cm is made on a

Last updated: 6/19/2023

7 A semi cylindrical groove of radius r 20 cm is made on a horizontal floor An ant wants to cross the groove A boy decides to help the ant making a bridge consisting of straight wire segments But all the wires available are of length 1 38 cm so the boy rigidly connects two wires at right angle and places the bridge in the groove as shown in the figure If the ant can crawl up a wire segment at speed v 0 5 cm s and down a wire segment at speed 2v in what minimum time can the ant cross the groove with the help of this bridge