Physics Problems With Solutions Mechanics For Olympiads And Contests Link 90%
Using the conservation of momentum: m₁v₁ + m₂v₂ = m₁v'₁ + m₂v'₂ 2(5) + 0 = 2v'₁ + 3v'₂
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Using the equation for elastic collisions: v'₁ = (m₁ - m₂)v₁ / (m₁ + m₂) v'₁ = (2 - 3)(5) / (2 + 3) = -1 m/s Using the conservation of momentum: m₁v₁ + m₂v₂
Unfinished Bitness
On macOS Mojave, the “sudo make install” part was failing for me, with the error “variable ‘PREFIX’ must be set”. Typing “env” seemed to show PREFIX set to /usr/local as per instructions so this was confusing. Then I tried “sudo env” and spotted that the sudo command didn’t have PREFIX set to anything. My solution was to invoke “sudo -i” then “export PREFIX=/usr/local” and finally “make install”
Good to know. What I documented worked at the time, at least for me. Its been some time so maybe a few things changed. Reply approved in case I need this info in the future or someone else does. Thanks!