Chapter 4, Problem 56P

The forces P and Q act on the handles of the wrench. If P = 321b and Q = 36 lb, determine the combined moment of the two forces about the z-axis.

To lift the table without tilting, the combined moment of the four parallel forces must be zero about the x-axis and the y-axis (O is the center of the table). Determine the magnitude of the force F and the distance d.

The force acting at A is F=10i+20j5kkN. Knowing that the moment of this force about the y-axis is 8jkNm, determine the distance b and the moment of F about point O.

Determine the moment of force F about point O. Express the result as a Cartesian vector. Assume F= 170 lb. what is Mo ib*ft?

In steadily turning the water pump, a person exerts the 120-N force on the handle as shown. Determine the moment of this force about point O. Ans. Mo = 14.74 N m CW %3D

Q3/ The 30-N force P is applied perpendicular to the portion BC of the bent bar. Determine the moment of P about point B and about point A (in two different ways). P = 30 N C 1.6 m 45° 1.6 m

Determine the coordinate direction angles of the force F applied at the end of the pipe such that the moment of F about point A is zero.

2/35 The 30-N force P is applied perpendicular to the por- tion BC of the bent bar. Determine the moments of P about point B and about point A.

The 4.0-Ib force is applied at point A of the crank assembly. Determine the moment of this force about point O.