# Q1 ​1. Two blocks of masses 20 kg and 50 kg are lying on the horizontal floor (coefficient of friction $\mu$ =0.5). initially staring is stretched and blocks are at rest. Now two forces 300 N and 150 N is applied on two blocks as shown in figure. The acceleration of 20kg block is 2.5 K m/s2. Find the value of K.  ​

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• 61
Let the tension in the rope be `T` and accleration of masses be `a`. The frictional force acting on 50kg block is 250N. And that on 20 kg block is 100N. Therefore we can say that, 300 - (250 + T) = 50a, and150 + T - 100 = 20a from here we get a = 100/70 or 1.4285 = 2.5 k , so k = 4/7
• -41
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