A semi-truck, travelling east at vt = 20 km/h, is struck head-on by a passenger car, mc = 1250 kg, traveling west at vc = 175 km/h. If the collision is perfectly inelastic, what is the mass of the semi-truck, if the two come to rest immediately after the collision?

f=gm1m2/d^2 it d

f is force g is gravitaiton constant, m1 is mass of first object, m2 is mass of second object. d is distance between two object

this allows people to make the best decision or pursue the best option. when alternatives are weighed using their advantages and disadvantages, the option whose disadvantages outweigh the advantages (based on a qualitative or quantitative analysis) are shunned while those whose advantages outweigh their disadvantages are pursued.