Chapter 4, Problem 143P

3. The rectangular block is to be pulled out of the ground using two strings A and B. String A is subjected to a force of 600 lb and is directed 60 degrees with the +x- axis. If the net force acting on the block is to be 1200 Ib, vertically upward, solve for the force T in string B and its direction angle 0. 600 Ib 60°

Q4- If the magnitude of the resultant force is to be 200 N, directed along the negative y axis, determine the magnitude of force F1 and its direction 0. 35 07 F2=100N F,?

Three forces act at point O. If it is known that the y-component of the resultant R is -3.9 kN and that the z-component is 3.0 kN, determine F3, 0, and R. Answers: F2 = 5.0 kN F₁ = 4.3 KN F3= KN 0 = R = KN

Determine the direction of force F in the direction of the vector AB when A = (2,3,6) and B = (6,3,1).

If 6 = 30° and the resultant force is to be 6 kN directed along the positive y axis, determine the magnitudes of F, and F, and the angle 0 if F, is required to be a minimum.

find the sum of the moments of the Forces in kN.m about Point O, (positive in the counter- clockwise direction). F1 = 60 kN and F2 = 22 kN. 15 m 9 m F1 kN F2 KN

The convergent system of 4 forces acting on an absolutely rigid body is balanced (ΣFKY = 0). Determine the projection of the fourth force on the Oy axis if F1y = 160.0 kN; F2y = -46.0 kN; F3y = 36.0 kN;.

Determine the force-couple system acting at point 0.

Q1/ As shown in Fig.( 1 ) draw the Free Body Diagram and express the force F as a Cartesian vector. Determine its coordinate direction angles of the force. 45° -30° F= 801b Fig.( 1 )