An arrow of mass Ma is red horizontally into a block of mass Mb. The arrow sticks in the block and the two travel a distance Ax before coming to a stop due to kinetic friction, pk, between the block and the ground. Let: Ma = 0.116 kg, Mb = 1.86 kg, Ax = 0.78 m, pk = 0.35 What is the initial speed of the arrow? Give the speed in m/s to at least three signicant digits