three small spheres of masses 20g, 40g, and 60g respectively lie in order in a straight line on a large smooth table. the distance between adjacent spheres is 10 cm. two slack strings, each 70 cm in length, connect the first sphere with the second, and the second sphere with the third. the 60 g sphere is projected with a speed of 5m/s, directly away from the other two. find: a. the time which elapses before the 20 g sphere begins to move and the speed with which it starts b. the loss in kinetic energy resulting from the two pulls.
