Ques1) Two blocks of masses M1 and M2 (In the above figure) are placed in contact with each other as shown. The voefficient of friction b/w M1 and platform is 2 and that b/w block M2 and platform is . The platform moves with the acc a. Show that the normal reacn b/w the blocks is non zero if a> g.Ques2) In the fogure two identical particles each of mass m are tied together with an extensible string. This is pulled at it's centre with a const force F. If the whole system lies on a smooth horizontal plane, then show that the acc of each particle towards each other is F/(2√3m).Ques3) For the arrangement shown in the figure the coefficient of friction b/w the two blocks is . If both the blocks r identical, then show that the acc of each block is (F/2m) - g.

Radhika Batra , 11 Years ago

Grade 11