24. tarzan tries to cross a river by swinging from one bank to the other on a vine that is 10.0m long. his speed at the bottom of the swing, just as he clears the surface of the river, is 8.0m/s. tarzan does not know that the vine has a breaking strength of 1.0 x 103n. what is the largest mass tarzan can have and make it safely across the river?