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Homework answers / question archive / 1) What is a conservation law? What is the basic approach taken when using a conservation law? 2) Could the linear momentum of a turtle be greater than the linear momentum of a horse? Explain
1) What is a conservation law? What is the basic approach taken when using a conservation law?
2) Could the linear momentum of a turtle be greater than the linear momentum of a horse? Explain.
3) Carts A and B stick together whenever they collide. The mass of A is twice that of B. How could you roll the carts so that they would be stopped after a collision?
4) How can a satellite's speed decrease without its angular momentum changing?
?Problems (show your work)
1) What is the linear momentum of an object with mass 50 kg and speed 15 m/s?
2) A 0.25 kg ball of clay is thrown at a stationary 5 kg block of wood. The clay sticks to the wood and their velocity after is 3 m/s. What was the original velocity of the clay?
3) A 50 kg boy on skates moves with a speed of 5 m/s. He runs into a stationary girl with skates of mass 40 kg. Assuming they stick together, what is their speed after the collision?
4) A running back with a mass of 80 kg and speed 8 m/s collides with, and is held by, a 120 kg defensive tackle going in the opposite direction. How fast must the tackle be going before the collision for their speed afterward to be zero?
