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3/181 Freight car A with a gross weight of 150,000 lb is moving along the horizontal track in a switching yard at 2 mi/hr. Freight car B with a gross weight of 120,000 lb and moving at 3 mi/hr overtakes car A and is coupled to it. Determine (a) the common velocity v of the two cars as they move together after being cou- pled and (b) the loss of energy |AE| due to the impact. 3 mi/hr 2 mi/hr

Answer 1

Solution Given date Coeight ot Cax A(t)SooDlh Weightof ca R(W)120,000 VA 2m)h 3 milb VB3 Applying crseureta mometum eatisn (mAme MAVA m V -V ISD000 32.2 32 2 2 Vo so00 32 V= 230000 N 3.582 tEl V 2uumil h

enengy Jntial kinate E mAVA nooooXu) IS0000 Jx(2x44 32.2 32. E mtme) V 2.qu1) IsDo00 120000 32 32 1 5364.53 (b DEI E- Sbou.9-364u.sa DE 2420 b. t
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