Answer to Question #115778 in Mechanics | Relativity for saruuol

Question #115778
2.50 · 104 moving at a speed of 4.00 m / skg wheel railwere moving in the same direction together at an initial speed of 2.00 m / s, each of which was 2.50 · 104kgcollided with a series of three wheelchairs interlocking with the massThe four-wheeler began to move in the same direction. A) Post-conflict 4What is the speed of the wheelchair? B) How much mechanical energy was lost in the collision?is it
1
Expert's answer
2020-05-15T08:46:01-0400

a)


"mv+3mu=(4m)V"

"V=0.25(v+3u)=0.25(4+3(2))=2.5\\frac{m}{s}"

b)


"\u0394E=0.5mv \n^2\n +0.5(3mu ^2\n )\u22120.5(4mV ^\n2\n )\\\\=0.5m(v ^\n2\n +3u ^\n2\n \u22124V ^\n2\n )"

"\u0394E=0.5(25000)(4 ^\n2\n +3(2) ^\n2\n \u22124(2.5) ^\n2\n )=37500\\ J"


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