Answer to Question #163379 in Physics for Andor Michael

Question

If an 8kg mass is pulled up an incline at a constant speed, determine the tension in the string. And the coefficient of friction between the 8kg mass and the surface (Assume there is no friction between the cord and the pulley)

Answer 1

$F=ma$

$T-\mu N-mg\sin\alpha=0$

$N=mg\cos\alpha$

$T-\mu mg\cos\alpha-mg\sin\alpha=0$

We obtained one equation with three unknowns. There is not enough data to solve the problem.