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A 1,600 kg car traveling north at 10.0 m/s crashes into a 1,400 kg car traveling east at 15 m/s at an unexpectedly icy intersection. The cars lock together as they skid on the ice. What is their speed after the crash?



Answer :

Use formula m1v1+m2v2= (m1+m2)v
(1600)(10)+(1400)(15)v

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