4. When we let go of m2, the two masses (mand m) will accelerate together from rest. Say, at a certain time, m has moved for a distance of Ax from its original place, as shown below. Ax v =? m track m2 v =? also Ax Apply Conservation of Energy to the system and find out the speed of m and m, in terms of Ax, g. m, and m2. (15 pts) NOTE: The horizontal distance m travels is equal to the vertical distance m2 descends (since the two are connected with a string).