general discussion in mechanics of a simple pendulum

Please Provide reason/expression for understanding.

Find the forces (F1,F2,F3 lb) in Fig. 364. (A=27, B=64, C=44) deg, (D=4, E=3, F=4) ft, F4=5440 lb If F4 is negative, then the direction of F4 is down. A negative answer indicates that the direction is reversed. Answers can be checked by demonstrating that components balance.

As a torque activity, your Physics TA sets up the arrangement shown below. m1 m2 A uniform rod of mass m, 251 g and m2 163 g and length L 100.0 cm is attached to the wall with a pin as shown. Cords are attached to the rod at the r, 10.0 cm and r, 90.0 cm mark, passed over pulleys, and masses of 187 g are attached. Your TA asks you to determine the following. (a) The position r, on the rod where you would suspend a mass m, = 200 g in order to balance the rod and keep it horizontal if released from a horizontal position. In addition, for this case, what force (magnitude and direction) does the pin exert on the rod? Use standard angle notation to determine the direction of the force the pin exerts on the rod. Express the direction of the force the pin exerts on the rod as the angle 0-, measured with respect to the positive x-axis (counterclockwise is positive and clockwise is negative). r3 m %| F. N (b) Let's now remove the mass m, and determine the new mass m, you would need to suspend…