PROBLEM 7: In the figure, µ = 0.30 for the contact of the 80-kg crate and the ground. Pulleys are frictionless. (a) determine the value of 0 to move the crate (b) Determine the tensile force (in N) in the rope attached to the crate to move the crate. (c) Determine the smallest force (in N) the man must exert on the rope to move the crate. 30°/ 45°

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PROBLEM 7: In the figure, μ = 0.30 for the contact of the 80-kg crate and the ground. Pulleys are frictionless. (a) determine the value of θ to move the crate (b) Determine the tensile force (in N) in the rope attached to the crate to move the crate. (c) Determine the smallest force (in N) the man must exert on the rope to move the crate

7. A ladder of length 12 m leaning up against a wall makes a 50 degree angle with the ground. The top of the ladder has sliders so that it can slide up and down the wall. Therefore, consider the top of the ladder to be frictionless. The ladder has a weight of 189 N that acts at its center. Someone weighing Fg = 1000 N is 0.92 m vertically below B, but on the ladder. Another person is on the ground holding the ladder by pushing on it horizontally with a force F. If the coefficient of static friction is 0.32, find the horizontal force F that must be applied at a vertical height of 1.2 m to prevent the ladder from slipping. LL F 1.2 m 12 m 50⁰ Fg B .92 m

5. The figure below represents the anatomy of the lower limb when balanced on your toes and the body weight acts through the tibia. The Achilles Tendon makes an angle (0) of 8° with the vertical and for this foot x1 is 6.2 cm and x2 is 12.3 cm. Calf Muscle Tibia Achilles Tendon Calculate the tension (T) in the Achilles Tendon if a 70 kg man stands on the toes of both feet. Using the values in this example what is the mechanical advantage for this lever and describe what that means in terms of the efficiency of the lever.

Q.3) The coefficient of friction between the 100 lb block (shown in figure below) and the incline plane is 0.25 and that between the cord and cylindrical support is 0.3. Determine the range of cylinder weight W for which the system shown below will be in equilibrium. p = 0.3 100 lb p = 0.25 25° W

Two weights are hung over two frictionless pulleys that are connected by a wire rope to a 500 Ib horizontal block that are in between and below them. The wire rope attached to the upper left end of the block and to the left pulley is at 45 degrees with the horizontal and the wire rope that connects the upper right end of the block to the right pulley is at 30 degrees with the horizontal. If the weight on the left pulley is 50 lb, fs= 0.30 and fk = 0.20 on the surface of block what weight W on the right pulley will cause the 500 lb block to just start moving to the right? *

30 in. 40 in. A F 25 in. 45 in. 35 in. Show Transcribed Text 60° A thin U-shaped member is kept in equilibrium in the vertical plane by up to three fingers and the cord (gravity acts downward). The weight of the member is uniformly distributed with 0.1 lb/in. So the total weight is 17.5 lb. Neglect the thickness of the member and any friction between the fingers and the member. Assume the finger force at G is zero. Determine the cord force and the other finger forces.

Solve it.

NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part A slender rod AB, with a weight of W, is attached to blocks A and B that move freely in the guides shown in the figure The constant of the spring is k. and the spring is unstretched when 0-0 Determine the value of 0 when W-75 lb, / 30 in, and k 3 lb/in. The value of is