Question

m1 A block with mass my = 9.4 kg is on an incline with an angle 6 = 33 with respect to the horizontal. For the first question there is no friction between the incline and the block. 1) When there is no friction, what is the magnitude of the acceleration of the block? m/s2 Submit 2) Now with friction, the acceleration is measured to be only a = 3.63 m/s2. What is the coefficient of kinetic friction between the incline and the block? Submit + 3) m To keep the mass from accelerating, a spring is attached with spring constant k = 167 N/m. What is the coefficient of static friction if the spring must extend at least x = 16 cm from its unstretched length to keep the block from moving down the plane? Submit +

Answer 1

17 9 = 2*9.818 Sin 33° magline 5,3929 mys? N 50.223 m/s2 9.4 11 ) anet = mgsime if ngcoso. ggino - Agrose m 3,63 - 5.3929 19,81 x Cos 339 4 C 0-208

3 tegemine 2kx2 + rong cose x x = mga sin 33 { x 167 x 0.182 + MX9.4 x 9.81*0.16 x Cos33 * 9.4X 9.81 x 0.16 X Sin 33 - ga 0.476 7 Troso ma T = 9.4 x 9.8) Cos33 - Log.952N inglese Now Mysoso 0,47 x 9.9 - 0.97 x M I 4.5546 ob
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