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Two blocks are at rest over a rough surface whose coefficient of friction 𝜇_𝑠 is 0.3. The minimum force F needed to set the system of blocks in motion is, A box of mass m is sitting on an incline of 45o and it requires an applied force F up the incline to get the box to begin to move. What is the maximum coefficient of static friction? How much force F is needed to maintain the position of the box? A satellite of mass m is in a circular orbit about the Earth (mass = M) at a height h above the surface, where h = r, the radius of the Earth. What velocity should this satellite have in order to maintain its orbit?