Question

2) Consider the two moving boxcars in Example 5. Car 1 has a mass of m₁ = 65000 kg and a velocity of v₀₁ = +0.80 m/s. Car 2 has a mass of m₂ = 92000 kg and a velocity of v₀₂ = +1.2 m/s, overtakes car 1 and couples to it. Determine the velocity of their center of mass (a) before and (b) after the collision.

3) John’s mass is 85.9 kg, and Barbara’s is 65.6 kg. He is standing on the x axis at x_J = +10.5 m, while she is standing on the x axis at x_B = +4.44 m. They switch positions. How far and in which direction does their center of mass move as a result of the switch?

Answer 1