A 50.0kg skater is travelling due east at a speed of 3.00 m/s. A 70.0kg skater is moving due
south at a speed of 7.00 m/s. They collide and hold on to one another after the collision,
managing to move off at an angle θ south of east with a speed vf. Find
(a) the angle θ (10 p)
(b) the speed vf, assuming that friction can be ignored. (15p)
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