Running Inside a Train
Difficulty: Easy · Topics: Conservation of Momentum, Recoil
Poyezd ichida yugurish
As shown, a person of mass m = 60 kg is at rest in a stationary train of mass M = 1000 kg. The person suddenly moves toward the front of the train at v = 5 m/s (measured by an observer outside the train).
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What will the speed of the train be? (No friction in the train's wheels.)
Rasmda ko‘rsatilganidek, m = 60 kg massali odam M = 1000 kg massali turgan poyezd ichida tinch turibdi. Odam to‘satdan poyezdning old tomoniga v = 5 m/s tezlik bilan harakatlanadi (poyezd tashqarisidagi kuzatuvchiga nisbatan o‘lchangan).
physics "view":[-0.5,-0.45,7.0,4.45],"alt":"A person of mass m runs forward at speed v inside a train of mass M on frictionless wheels.","items":["type":"ground","from":[-0.4,0.17],"to":[6.9,0.17],"depth":0.35,"type":"polyline","points":[[0,0.8],[6.5,0.8],[6.5,4.0],[0,4.0]],"closed":true,"width":4.5,"colour":" 8A8A8A","type":"wheel","at":[1.4,0.55],"r":0.38,"type":"wheel","at":[5.1,0.55],"r":0.38,"type":"person","at":[3.0,0.82],"h":1.5,"pose":"run","type":"arrow","from":[3.45,2.05],"to":[4.6,2.05],"colour":"velocity","width":2,"head":10,"label":"v","anchor":"e","labelAt":[4.8,2.05],"type":"label","at":[2.2,1.9],"text":"m","anchor":"c","size":16,"math":true,"type":"label","at":[0.55,3.2],"text":"M","anchor":"c","size":18,"math":true]
Poyezdning tezligi qanday bo‘ladi? (Poyezd g‘ildiraklarida ishqalanish yo‘q.)