(1) A pulling force 7=32 lb is applied to the cord, which is wound securely around the inner hub of the drum shown. (a) Determine the moment of T about the drum center C. (b) At what angle should I be applied so that the moment about the bottom contact point P is zero? Ans: (a) 13.33 lb-ft CW (b) 51.3° T = 32 lb 5" ск 8" P

(8) A sailor is sitting in a boatswain's chair that is suspended from the pulley C as shown. If the combined weight of the sailor and the chair is 200 lb, determine the tensions in cable AB and CD for a = 30° and ẞ = 10°. Ans: TAB 269 lb, TCD = 37.0 lb

Calculate the moment Mg of the 780-N force about the bolt at B. Simplify your work by first replacing the force by its equivalent force- couple system at A. The moment is positive if counterclockwise, negative if clockwise. Assume F = 780 N. r = 195 mm, h=620 mm, 0 = 33% = 40° Answer: Ma N-m

No. 4 pls with the choices: 140lbs, 142lbs, 146lbs, and 144lbs.

A bowling ball is rolled down the alley with a constant velocity of 1.4 m/sec. at an angle of 86° to the starting line. The position of the person throwing the bowling ball can be represented by the point (0,0). Where is the ball after 8 seconds? O (0.1,1.4) O (0.6,8.0) O (0.8,11.2) O (11.2,0.8) A ball is thrown with a slingshot at a velocity of 95 ft./sec. at an angle 25° above the ground from a height of 6 ft. Approximately how long does it take for the ball to hit the ground? Acceleration due to gravity is 32 ft./s2. O2.65 seconds O2.51 seconds 05.45 seconds 5.38 seconds

3. A ball is thrown with an initial velocity of 70 ft/sec, at an angle of 35° with the horizontal. Find the vertical and horizontal components of the velocity. 4. To carry a 100-pound cylindrical weight, two people lift on the ends of short ropes that are tied to an eyelet on the top center of the cylinder. Each rope makes a 20° angle with the vertical. Draw a figure that gives a visual representation of the problem, and find the tension in the ropes.

A weight of mass 100 kg hangs from two wires that make angles of 54° and 48°, respectively, below the horizontal, as shown in the diagram. 100kg T2 T₂ = T2 Find the tensions (forces) in both wires: T₁ Round your answer to 2 decimal places. i+ Round your answer to 2 decimal places. j. Round your answer to 2 decimal places. i+ Round your answer to 2 decimal places. j.

m21 = mL2 = 2X95° 5. mL3 = 3. A m24 = m25 = 4.

A commuter airplane starts from an airport and it first flies to a city A located at 200 km on a direction 30° north of east. Next it flies 150 km 20° west of north to city B. a. Using graphical method, draw both displacements using scale: 50 km = 1cm. b. Find the location of city B relative to the location of the starting poin. c. Find x and y components of each displacement. d. What are x and y components of resultant displacement? e. Using Pythagorean theorem and tangent function find magnitude and direction of resultant displacement.

Determine the combined moment about O due to the weight of the mailbox and the cross member AB. The mailbox weighs 5.0 lb and the uniform cross member weighs 10.1 lb. Both weights act at the geometric centers of the respective items. The moment will be positive if counterclockwise, negative if clockwise. 1" 8" 25" 4" 8" 3.7" A 35" Answer: Mo = i B lb-in.