4.23 The center of gravity of the 850-N man is at G. If the man pulls on the rope with a 388-N force, determine the horizontal distance b between the man's feet and G. 388 N 06m 30 30 1.2m 12m KSO N Fo D FBD Figure P4.23
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- Question 1 25 A 380 kN horizontal force P is applied to a 210 kN box resting on an 25° incline. The line of action of Ppasses through the center of gravity of the box. The box Is 3.5 m wide x 3 m tall, and the coefficents of friction between the box and the surface are 14 -0.6 and 14% -0.51. Determine the magnitude of the friction force acting on the box. F'= The box is In static equilibrium Sliding up the incline Sliding down the incline. ○ Tipping8. At an amusement park there is a ride in which cylindrically shaped chambers spin around a central axis. People sit in seats facing the axis, their backs against the outer wall. At one instant the outer wall moves at a speed of 3.60 m/s, and an 87.0-kg person feels a 590-N force pressing against his back. What is the radius of the chamber? mThe see-saw is balance.d What is the magnitude of the weight of the person hanging off the edge? 4m- 2m. LIST = N 11 WT-500 N
- A box of mass M = 50 kg rests on a rough (ji) horizontal surface. When a force F = 300 N is acted on the box as %3D %3D shown in the figure below, the box becomes on the verge of slipping (Y alig de j gainall ). The coefficient of static friction of the rough surface is: F A. 0.92 B. 0.75 40° C. 0.14 D. 0.57 E. 0.34A. What pool is needed to just start the crate to tip B. How hard does the floor push on the crate c.A 0.50-mm-radius fishing line made of nylon is 100 m long when no forces are applied. A fish is hooked and pulls with a tension force Of 250 N. What is the elongation?
- 2. Determine the minimum value of P to just lift the block W = 500 N, where 0 = 20°, as shown. The coefficient of static friction at all contact surfaces is Hs = 0.30. Neglect the weight of the wedge. WThere is a 31.5 kg box sitting on the shelf. 1 lb=4.448 N a) What is the box's weight in N? b) What is the box's mass in the US (English) system?1. A 160kg utility pole extends 12.0m above the ground. A horizontal force of 250N acts at its top and the pole is held in the vertical position by a cable. a. Draw a free-body (or force) diagram for the pole. b. Determine the tension in the cable. c. What are the reaction forces exerted at the lower end of the pole by the ground? 2. A 40.0kg uniform platform is suspended by two cables, 2.00m apart, where the centre of the platform lies midway between the cables. A 5.00kg paint bucket is placed on the platform, 24.0cm to the right of the right cable. Determine the tension in each cable.