A small stone of mass m = 1kg is stuck at the front of mass M = 10kg at height h = 1m. The coefficient of friction between the two masses is μ = 0.2 as shown. For this problem ignore the air resistance. (a) Find the minimum force F such that the mass m will stuck on mass M. (b) If the two mass start from rest with the force F(answer from above) is applied for 10s. The mass M then suddenly stops sending the mass m flying forward. Find the distance between where the mass M stops and where mass m lands.

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Static and Kinetic Friction

Kinetic friction comes into existence when there are moving surfaces means in other words we can say that the force which comes into existing between moving surfaces is known as kinetic friction.