## anonymous one year ago Could use some help getting started with this question. Thanks

1. anonymous

The steel ingot shown in Fig. 2 has a mass of 1800 kg. It travels along the conveyor at a speed v = 0.5 m/s when it collides with the nested spring assembly. Determine the maximum deflections in each spring needed to stop the motion of the ingot, if kA = 5 kN/m and kB = 3 kN/m.

2. IrishBoy123

when it stops, the KE of the ingot will temporarily be stored as PE in the springs, and generally speaking we can say $$PE = \frac{1}{2}kx^2$$ here you will have different extensions (NB read: compressions) as the springs are staggered [we assume that the first spring will not stop the ingot in 0.1m but you can check that first if you like thus we combine energy in the springs for a general extension x as $$PE = \frac{1}{2} \left[ k_a x^2 + k_b (x-0.1)^2\right]$$ hopefully $$x \lt 0.5$$ or something is broken....