5 a. most visitiv fogmost to sidsgo a ogniwore lamal's The cylinder A in Fig. 5a moves towards cylinder B at a speed of 7 m/s along a frictionless rod. Cylinder B is attached to a spring of negligible mass which is undeformed in the position shown. If the coefficient of restitution is 0.9, what is the maximum deflection of the spring, given that the masses of cylinders A and B are 5 kg and 20 kg respectively, and the stiffness of the spring S is 2000 N/m? 11. 18. Draw important van 021 ph. Fig. 5a B S ////////

Forming a shock absorber, two springs of equal length are nested together. If the maximum compression of the springs is 0.25 and the outer spring has a stiffness of Ka = 420 N/m, what stiffness is required of the inner spring Kb? The design of the spring system is such that if a mass of 2.5 kg is at rest, then dropped from a distance of 0.75 m above the springs, the spring system will catch and stop the mass.

A truck with mass m=1000kg is traveling around a circular curve of radius r=835m when it starts to rain. The coefficient of static friction between the road and the tires is μdry=0.63 when dry, and it is μwet=0.15. The road is level, and the curve is unbanked.   (a) When conditions are dry, what is the maximum tangential speed, in meters per second, at which the truck can take the corner at without slipping?  61.74 is wrong.  (b) When conditions are wet, what is the maximum tangential speed, in meters per second, without slipping?

1 Problem During a particularly snowy winter in Charlotte, a child of mass m slides down a ramp starting at rest from point A and encounters the melted grassy area at B before coming to a full stop at C. Assume the ice is frictionless. The height of point A is hĄ and the distance between B and C is L. What is the coefficient of friction of the grass, k? Assume that g = 9.81 m/s², ha = 5 m, m = 20 kg, and L = 10 m. hA P JA Ice B Grass L C