Two ice skaters stand together. They push off and traveldirectly away from each

Question

Two ice skaters stand together. They push off and traveldirectly away from each other, the boy with a velocity of v = +0.35 m/s. If the boy weights 745N and girl 477 N, what is thevelocity after they push off?( Consider the ice to be frictionless)__________m/s A small car with a mass of 900 kg travels northward at 30 m/s.Does the car have more or less momentum than a truck with a mass of13000 kg traveling eastward at 20m/s__________ more/less. How much more or less __________ times Two ice skaters stand together. They push off and traveldirectly away from each other, the boy with a velocity of v = +0.35 m/s. If the boy weights 745N and girl 477 N, what is thevelocity after they push off?( Consider the ice to be frictionless)__________m/s A small car with a mass of 900 kg travels northward at 30 m/s.Does the car have more or less momentum than a truck with a mass of13000 kg traveling eastward at 20m/s__________ more/less. How much more or less __________ times

Explanation / Answer

a, apply the conservation of momentum => m1*v1=m2*v2 =>v=745*0.35/477=0.547 m/s b,momentum of car is 900*30=27000 kgm/s momentum of truck is 13000*20=260000 kgm/s => less than 233000 kgm/s (9.63 times)

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