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6. Two football players run towards each other and collide on a slick, muddy field. Assuming...

6. Two football players run towards each other and collide on a slick, muddy field. Assuming that player A has mass of 85 kg and speed of 7 m/s and player B has mass of 75 kg and speed of 7.5 m/s, what happens right after they collide (and stick together)?

8. A red cart collides with a blue cart on a rough surface. Which forces acting on the blue cart are internal, if the system is red cart + blue cart?

17. A weight of 10 N is located 30 cm to the left of the fulcrum of a balance beam. At what distance from the fulcrum should a 15 N weight be placed to balance the beam?

22. A car and a truck move at the same speed, but the truck has twice as much mass as the car. Which has a bigger kinetic energy?

25. A person pushes on a 5 kg block with a force of 80 N, while 10 N of friction acts on the block. If it travels 3 m, what total work is done on the block?

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