Pushed Apart from the Inside
Difficulty: Easy · Topics: Momentum, Conservation of Momentum, Explosions
Ichki kuch bilan ajralish
As shown in the figure, an object of mass 2 kg moves at 10 m/s on a frictionless horizontal surface. An internal force divides it into A (0.8 kg) and B (1.2 kg), which move in opposite directions; B moves at 20 m/s.
physics "view":[-0.1,-1.1,10.3,1.7],"alt":"Before: a 2 kg object moves right at 10 m/s. After: A (0.8 kg) moves left at v and B (1.2 kg) moves right at 20 m/s.","items":["type":"ground","from":[0,0],"to":[4.8,0],"depth":0.35,"type":"block","at":[0.4,0],"size":[1.8,0.85],"type":"label","at":[1.3,1.15],"text":"2 kg","anchor":"c","size":13,"type":"arrow","from":[2.3200000000000003,0.357],"to":[3.2500000000000004,0.357],"colour":"velocity","width":1.8,"head":9,"type":"label","at":[2.785,0.757],"text":"10 m/s","anchor":"c","size":13,"type":"label","at":[2.4,-0.75],"text":"before separation","anchor":"c","size":13,"type":"ground","from":[5.4,0],"to":[10.2,0],"depth":0.35,"type":"block","at":[6.800000000000001,0],"size":[0.8,0.75],"text":"A","type":"label","at":[7.200000000000001,1.05],"text":"0.8 kg","anchor":"c","size":13,"type":"arrow","from":[6.680000000000001,0.315],"to":[5.750000000000001,0.315],"colour":"velocity","width":1.8,"head":9,"type":"label","at":[6.215000000000001,0.7150000000000001],"text":"v","anchor":"c","size":13,"math":true,"type":"block","at":[8.2,0],"size":[0.9,0.75],"text":"B","type":"label","at":[8.649999999999999,1.05],"text":"1.2 kg","anchor":"c","size":13,"type":"arrow","from":[9.219999999999999,0.315],"to":[10.149999999999999,0.315],"colour":"velocity","width":1.8,"head":9,"type":"label","at":[9.684999999999999,0.7150000000000001],"text":"20 m/s","anchor":"c","size":13,"type":"label","at":[7.800000000000001,-0.75],"text":"after separation","anchor":"c","size":13]
What is the speed of A after separation?
Rasmda ko‘rsatilganidek, massasi 2 kg bo‘lgan jism ishqalanishsiz gorizontal sirtda 10 m/s tezlik bilan harakatlanadi. Ichki kuch uni A (0.8 kg) va B (1.2 kg) qismlarga ajratadi va ular qarama-qarshi tomonlarga harakatlanadi; B ning tezligi 20 m/s.
physics "view":[-0.1,-1.1,10.3,1.7],"alt":"Before: a 2 kg object moves right at 10 m/s. After: A (0.8 kg) moves left at v and B (1.2 kg) moves right at 20 m/s.","items":["type":"ground","from":[0,0],"to":[4.8,0],"depth":0.35,"type":"block","at":[0.4,0],"size":[1.8,0.85],"type":"label","at":[1.3,1.15],"text":"2 kg","anchor":"c","size":13,"type":"arrow","from":[2.3200000000000003,0.357],"to":[3.2500000000000004,0.357],"colour":"velocity","width":1.8,"head":9,"type":"label","at":[2.785,0.757],"text":"10 m/s","anchor":"c","size":13,"type":"label","at":[2.4,-0.75],"text":"ajralishdan oldin","anchor":"c","size":13,"type":"ground","from":[5.4,0],"to":[10.2,0],"depth":0.35,"type":"block","at":[6.800000000000001,0],"size":[0.8,0.75],"text":"A","type":"label","at":[7.200000000000001,1.05],"text":"0.8 kg","anchor":"c","size":13,"type":"arrow","from":[6.680000000000001,0.315],"to":[5.750000000000001,0.315],"colour":"velocity","width":1.8,"head":9,"type":"label","at":[6.215000000000001,0.7150000000000001],"text":"v","anchor":"c","size":13,"math":true,"type":"block","at":[8.2,0],"size":[0.9,0.75],"text":"B","type":"label","at":[8.649999999999999,1.05],"text":"1.2 kg","anchor":"c","size":13,"type":"arrow","from":[9.219999999999999,0.315],"to":[10.149999999999999,0.315],"colour":"velocity","width":1.8,"head":9,"type":"label","at":[9.684999999999999,0.7150000000000001],"text":"20 m/s","anchor":"c","size":13,"type":"label","at":[7.800000000000001,-0.75],"text":"ajralgandan keyin","anchor":"c","size":13]
Ajralgandan keyin A ning tezligi nimaga teng?