Recent content by ChaoticNeutralStuden

So... I'm kinda lost now, how do I find the coefficient of friction using the Newton's law in this situation? I considered that a force of the same magnitude of mgsin θ was acting when the block reachs the beginning of the horizontal plane. I know i can reach the result by using kinemactic...

Using Newton's Law : At the first moment(ramp): ΣFx : m*g(sin θ )=m*a a= g*(sin θ ) ΣFy = N-mg(cos θ )= 0 N=mg(cos θ ) When the block starts to travel D ΣFy = N-mg=0 N=mg Friction force = N*uc Friction force = mg*uc ΣFx : m*g(sin θ )- mg*uc =0 m*g(sin θ )= mg*uc uc=sin θ sin θ = h/ hypotenuse...

Using the Newton's laws my result was h/hypotenuse and using the energy equations my result was h/D. My results are right ? And if so, how i justify the hypotenuse = D . Sorry for the bad english, the homework was poorly translated.