You pull a 17-kg box across the floorwith a strap that is at an angle of 39° abo

Question

You pull a 17-kg box across the floorwith a strap that is at an angle of 39° above the horizontal. Find the normal forceand the tension in the strap, given that the box moves withconstant speed and that the coefficient of kinetic friction betweenthe box and the floor is 0.39. You pull a 17-kg box across the floorwith a strap that is at an angle of 39° above the horizontal. Find the normal forceand the tension in the strap, given that the box moves withconstant speed and that the coefficient of kinetic friction betweenthe box and the floor is 0.39.

Explanation / Answer

Given that the mass of box is m = 17 kg
   The angle above horizontal is =39o
   coefficient of kinetic friction between the box andthe floor is = 0.39
----------------------------------------------------------------------------



If the body moving with constant velocity then
                        T cos - *N = 0
                         
But the normal forceis N = mg - Tsin   -------- (1)
                      then     T cos - *(mg -Tsin ) = 0                                  T cos + *Tsin  - mg =0                                  T ( cos + sin) - mg =0                                    T= mg / ( cos + sin)                                         =--------- N Substitude T value in equation (1) we get normal forceis N = ------- N                         

Related Questions

Navigate

• Browse (All)
• Browse Y
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.