A wooden box, with a mass of 22 kg, is pulled at a constant

Question

speed with a rope that makes an angle of 25° with the
wooden floor. What is the tension in the rope?

Answer 1

constant speed?
friction=tension*cos25
but friction=mu(mg-tension*sin25)

mu(mg-tension*sin25)=tension*cos25
solve for tension...

tension(cos25-mu*sin25)= -mu*mg

so you need to know the coefficent of friction mu to solve this.