Recent content by tehjinxman

So Ke1i = .5(1)(2^2) =2 Ke2i = 0 KeTotal = 2 Ke1f = .5(1)(-1^2) = 0.5 So Ke2f must = 1.5 KeTotal = 2 Ke1f+Ke2f = 2 .5 + (mv^2)/2 = 2 mv^2 = 3 Then compare MV = 3 and MV^2 = 3? So MV^2 = MV Which means V must be 1m/s and M must be 3 Kg?

Homework Statement A 1 Kg car moving at 2m/s collides elastically with a stationary car. The first car rebounds opposite to the original direction at 1m/s and the second car moves off in the original direction of the first car. A) What is the mass of the 2nd car B) What is the speed of...