A 45.5-kg skater is traveling due east at a speed of 3.04 m/s. A 71.5-kg skater is moving due south at a speed of 7.14 m/s.?

(45.5 x 3.04) = 138.32 kg/m/sec. Momentum. (71.5 x 7.14) = 510.51 kg/m/sec.

Momentum. The more massive skater clearly has more momentum, so the angle finally will be closer to south than east. Sqrt.(138.32^2 + 510.51^2) = 528.92.

528.92/(45.5 + 71.5) = V of 4.52m/sec. Direction = arctan (138.32/510.51) = 15.16 degrees east of south.

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