Hello,
I dont know in which drection should i start resolving forces.
Usually i come up wwith correct answer to a problem sometimes i ve got simple result like
F-20sin 15 and it is wrong. in this case it was suposssed to be -F+20sin
the friction goes (f)-> this direction and there is a component force opposing (sin)<-
it is on inclined plane. so i start from the right side positively
f-20 sin 15.
now i notices that the particle travels downwords so that probably the reason why.
but anyway, do you have any particular strategy for solving this sort of stuff?
thank you,
petr.
I dont know in which drection should i start resolving forces.
Usually i come up wwith correct answer to a problem sometimes i ve got simple result like
F-20sin 15 and it is wrong. in this case it was suposssed to be -F+20sin
the friction goes (f)-> this direction and there is a component force opposing (sin)<-
it is on inclined plane. so i start from the right side positively
f-20 sin 15.
now i notices that the particle travels downwords so that probably the reason why.
but anyway, do you have any particular strategy for solving this sort of stuff?
thank you,
petr.