A block with mass m1 = 9.4 kg is on an incline with an angle θ =34° with respect to the horizontal. For the first question there isno friction between the incline and the block. 1) When there is nofriction, what is the magnitude of the acceleration of the block?m/s2 2) Now with friction, the acceleration is measured to be onlya = 3.73 m/s2. What is the coefficient of kinetic friction betweenthe incline and the block? 3) To keep the mass from accelerating, aspring is attached with spring constant k = 168 N/m. What is thecoefficient of static friction if the spring must extend at least x= 16 cm from its unstretched length to keep the block from movingdown the plane? 4) The spring is replaced with a massless rope thatpulls horizontally to prevent the block from moving. What is thetension in the rope? N 5) Now a new block is attached to the firstblock. The new block is made of a different material and has acoefficient of static friction μ = 1.01. What minimum mass isneeded to keep the system from accelerating? kg
