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In the design of a spring bumper for a 2780-Ib car, it is desired to bring...
In the design of a spring bumper for a 3500-lb car, it is
desired to bring the car to a stop from a speed of 5 mi/hr in a
distance equal to 6 in. of spring deformation. Specify the required
stiffness k for each of the two springs behind the bumper. The
springs are undeformed at the start of impact.
0 5 mi/hr
F(N) *14-12. Design considerations for the bumper B on the 5-Mg train car require use of a nonlinear spring having the load- deflection characteristics shown in the graph. Select the proper value of k so that the maximum deflection of the spring is limited to 0.2 m when the car, traveling at 4 m/s, strikes the rigid stop. Neglect the mass of the car wheels.
2. Suppose a car travels 108 km at a speed of 20.0 m/s, and uses
2.20 gallons of gasoline. Only 30% of the gasoline goes into useful
work by the force that keeps the car moving at constant speed
despite friction. (The energy content of gasoline is 1.3 ✕
108 J per gallon.)
(a) What is the force exerted to keep the car moving at constant
speed?
N
(b) If the required force is directly proportional to speed, how
many...
Problems care for the car og man Molg is Propeted from rest by a spring with 2005 oy potential energy The Cá Collidesinelastically with a slond av og equal mass Together the cars rou up the hill and come to a stop Find the speed at A and at B. find the height h. A m 2 sit to Inelastic collisions of two lars as the final speed of the system sketched below. Find tano: Calculate in op: 1 o...