Recent content by pulcroman

Well, i gave it a bit more thought and came up with this: for the loop: Ek(final)^2+Ep(final)-Ek(inicial)=-Fk dx Fk=µk N; dx=pi R N ?=mv^2/R+mgcosø (the + doesn't matter, after quarter the circle it'll change from - to +) Ek(final)^2+Ep(final)-Ek(initial)=-µk (mv^2/R + ∫mgcosø 0->pi*) pi...

hi, thanks for your help! well, according to the free body diagram, from 0 to π/2 gravitacional force is negative and normal force is positive. N-mgcosø=mv^2/r <--- and that negative sign will change after π/2 because normal and gravitational will have the same sign! i have to give the...

ok, there it goes http://wwwprof.uniandes.edu.co/~gtellez/fisica1/ejercicios-semana10.pdf i wanted to add: what will be the TOTAL work made by friction passing on half of a loop (this is for purposes of integration, if necessary !)

Hello, i appreciate your help! 1. Homework Statement In this website the drawing of the situation in the first exercise can be seen, for better understanding. http://wwwprof.uniandes.edu.co/~gtel...s-semana10.pdf The problem asks me to determine the minimum height h to allow an...

Hello, i appreciate your help! Homework Statement In this website the drawing of the situation in the first exercise can be seen, for better understanding. http://wwwprof.uniandes.edu.co/~gtellez/fisica1/ejercicios-semana10.pdf The problem asks me to determine the minimum height h to allow...