DİNAMİK İKİNCİ VİZE EK DERS SORULARI 1) Determine the normal and frictional driving forces that the partial spiral track exerts on the 200 kg motorcycle at the instant 3 5 rad, = 0.4 rad/s, and = 0.8 rad/s 2 . Neglect the size of the motorcycle. 2) A crate initially traveling horizontally with a speed of 5.5 m/s, is made to slide down a 4.3 m chute inclined at 35 o . The surface of the chute has a coefficient of kinetic friction k and at its lower end, it smoothly lets the crate onto a horizontal trajectory. The horizontal surface has a coefficient of kinetic friction k2. a) If k=0.35, what is the speed with which the crate reaches the bottom of the chute (immediately before the crate’s trajectory becomes horizontal)? b) Find k such that the crate’s speed at the bottom of the chute (immediately before the crate’s trajectory becomes horizontal) is 4.6 m/s? c) Let k =0.5 and suppose that once the crate reaches the bottom of the chute and after sliding horizontally for 1.5 m, the crate runs into a bumper. If the mass of the crate is m = 50 kg, k2 = 0.33, determine the stiffness k which the spring must have if the maximum compression is 0.6 m after impacting.