An 85-kg skier starts from rest at the top of a hill of height 10 m.

(a) What will his speed be at the bottom of the hill? Assume the friction between his skies and the snow is negligible and the work done by the force of air resistance is 5.0x10³J.

(b) After the skier had reached the bottom of the hill he continues sliding on the horizontal surface there. Another skier, coming from a direction at 90^o with the first one direction of motion collides with him. The second skier is 52 kg and his speed before collision is 4.2 m/s. If after the collision they stay entangled together, find their speed and direction. The solution must include a figure showing the velocities of the two objects before and after the collision and a well defined coordinate system.