Engineering Mechanics Statics
(Homework #2, Due on March.18)
1. Determine the moment of each force about the bolt located at A. Take
FB=200 N, FC=250 N.
1.1 If FB=150 N, FC=225 N, determine the resultant moment about located at
A.
Probs.1-1.1
2. The rod on the power control mechanism for a business jet is subjected to a
force of 80 N. Determine the moment of this force about the bearing at A.
Probs.2
3. A 20-N horizontal force is applied perpendicular to the socket wrench.
Determine the magnitude and the coordinate direction angles of the
moment created by this force about point O.
Probs.3
4. The flex-headed ratchet wrench is subjected to a force of P =16 lb, applied
perpendicular to the handle as shown. Determine the moment or torque
this imparts along the vertical axis of the bolt at A.
4.1 If a torque or moment of 80 lb．in. is required to loosen the bolt at A,
determine the force P that must be applied perpendicular to the handle of
the flex-headed ratchet wrench.
Probs.4-4.1
5. Replace the two forces acting on the grinder by a resultant force and
couple moment at point O. Express the results in Cartesian vector form.
Probs.5
6. Replace the force system acting on the pipe assembly by a resultant force
and couple moment at point O. Express the results in Cartesian vector form.
Probs.6