Determine the moment about point O. (ANS: 14.5 kN-m, CW) d 75° 30° 3 m 45° F = 5 kN

Find 0(theta) and W in the figure below where w1 = 15.0 N, w2 = 31.0 N, and ? = 64.0°, assuming that the arrangement is at rest. 0(theta)=   W =

Q1. Determine the resultant moment +be fig show n below: 200N 70 SOON

3. The figure to the right shows a rod that is connected to a frictionless table through a pin-labeled by A -placed through the center of it. (You are looking down on the table.) The rod has mass m and length l. Although the rod is initially at rest, it can rotate freely (without friction) about the pin. A small particle with mass m/3, and moving with an initial velocity vo vo collides with the end of the rod. After the collision the mass stops moving, and the rod starts rotating with angular velocity w. I would strongly recommend that you draw a free body diagram for the rod in parts a and b. a. Linear momentum is not conserved for this collision. Explain in detail why. b. Angular momentum is conserved about the pivot. Explain in detail why. c. What is w? Express it in terms of vo, and l. d. Is energy conserved in the collision? Justify your answer by calculating the change in energy of the system in the collision. e. After a time T after the collision the rod will rotate around and…

F3-20. Determine the resultant couple moment acting on the triangular plate. 200 N 150 N 0.4 m 04 m 200 N 150 N 0.4 m 300 N 300 N

8. The image below depicts a street light standard that has been blown off of vertical by high winds during storm. A force of 1000N is being applied to the standard in order to "upright" the standard. Determine the magnitude and sense of the Moment about point A at the instant depicted. N-m. Be sure to include whether the Moment is Moment = Positive or Negative for this 2D problem. B 6 m 75° 3 m

20

*3-8. The foot segment is subjected to the pull of the two plantarflexor muscles. Determine the moment of each force about the point of contact A on the ground. F = 150 N F = 100 N 30% 70° 100 mm 25 mm -87.5 mm

Consider the two vectors A= 12i + 5j and B = -3i. What is the cross product Ax B? O51 k none of the answers -15k O 15 j 15 k O.51 k -21 O 21 k -51

A tennis ball, starting from rest, rolls down the hill in the figure. At the end of the hill the ball becomes airborne, leaving at an angle of 35° with respect to the ground. Treat the ball as a thin-walled spherical shell, and determine the range x. Number i eTextbook and Media Save for Later 12 W S #3 1.8 m 135 Units Attempts: 0 of 3 used Submit Answer APR 2 tv I all A 80 F3 a F4 E $ 14 95 F5 MacBook Air % 50 6 C F6 27 & < F7 R T Y U D F G H * 00 8 DII F8 D F9 ( 9 O A F10 F11 t O { P [ J K L X C V B N M H command ? H command option