Two particles d and b. of mass in and 3m respectively. are connected by a light inextensible string of length 7. particle a is placed on a horizontal table at a perpendicular distance / from its edge, the coefficient of friction between particle a and the table being 1/3. particle b, which is at the edge of the table, is just pushed over the edge and subsequently falls under the action of gravity and the tension in the string, assuming that there is no friction between the string and the table, show that the speed of 4 when it reaches the table edge is 2 (81/3). find also the time taken by particle to reach the edge of the table and the tension in the string while a is moving on the table.