Question

3) mm m To keep the mass from accelerating, a spring is attached with spring constant k = 150 N/m. What is the coefficient of static friction if the spring must extend at least X - 15 cm from its unstretched length to keep the block from moving down the plane? Submit mi The spring is replaced with a massless rope that pulls horizontally to prevent the block from moving. What is the tension in the rope? N Submit

Answer 1

Value of m, and is not given. ka mt MM mig sino K2150 N/m To keep the bolock from moting extension of m, gcoso of fric 20.15 m mig the spring re= 15 cm Coeffiecient oting is al Froom froee body diagram, ana kat MN = migs or, M= mig sino - (150 x 0.15 migcoso Nam, goso - sino Now, Teose spring replace with mass less nope, IN Teose MN Tsina od migsine magsino mg coso t migcoso ng Tsina) SO migcose + Tsino and I cose M N = m migsina T (Caso + Msino) = (migsing (migsing -um, geoso) mig sino-M cose COSO AMsino T-