Two forces equal in magnitude and opposite in direction, acting on an object at

Question

Two forces equal in magnitude and opposite in direction, acting on an object at two different points, form what is called a couple. Two antiparallel forces with equal magnitudes_1 = F_2 =7.90 N are applied to a rod as shown in the figure (Figure1). What should the distance l between the forces be if they are to provide a net torque of 5.20 N m about the left end of the rod? Is the sense of this torque clockwise or counterclockwise? Repeat for a pivot at the point on the rod where F_2 is applied.

Explanation / Answer

(a)

Net torque acting on the rod is,

tow = 3*F1 - (3+L) * F2

5.2= 3*7.9 - (3+L) * 7.9

Solve for L

L= 0.658 m

----------------------------

(b)

Net torque is clockwise.

---------

(c)

Net torque acting on the rod is,

tow =L*F1

5.2 = L * 7.9

L = 0.658 m

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

---

---

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