4. A suspension bridge cable is connected to its anchor at a 20 angle. Draw a force diagram for the anchor, and then find the vertical and horizontal component forces on the anchor by the cable. cable 15,000 N anchor 200 A real suspension bridge anchor
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- Which of the following statements about the force of static friction between two surfaces is false? a. It takes on any value between zero and the maximum possible force of static friction, fs,max = μs N. b. It depends on the area of contact between the surfaces. c. It is only present between two surfaces that aren’t moving with respect to each other. d. It is parallel to the surface of contact, and in the direction that opposes relative motion.If a body is in equilibrium and a 300 N force is acting on it to the East, what other force must also be acting on it? Select one: O a. 300 N, East b. 300 N, West c. 150 N, West d. 150 N, East O e. 300 N1. A crate is being push by a horizontal force P to cause movement upward along the 15° incline without tipping. The crate has a mass of 30 kg. Type only the numerical values. Please indicate positve sign (+) for values in upward or rightward direction and negative sign (+) for values in downward and leftward direction. L P В A D 15° Your answer a) Determine the largest allowable coefficient of static friction between the crate and the incline. Your answer b) the corresponding magnitude of force Pin Newtons. Your answer
- A box is being pulled across a level floor by a rope attached to the box The rope is pulling partly upward at an angle of 30 degrees to the horizontal. In this circumstance A. The normal force between the box and the floor is greater than the weight of the box. B. The normal force between the box and the floor is less than the force of gravity on the box. C. The normal force between the box and the floor is the same as the force of gravity on the box. D. Which of the above is correct depends on whether or not the box is accelerating. E. Which of the above is correct depends on whether or not there is friction between the box and the floor. F. None of the above answers is correct.6. A wedge of cheese is suspended at rest by two strings which exert forces of magnitude F1 (Black) and F2 (Red), as seen below. F1 is applied at an angle of 50 degrees to the horizontal. There is also a downward force of gra on the cheese of magnitude 15N (Green). What is the magnitude of the force F1? What is the magnitude of the force F2?What does static equallibrium mean in mechanics for an object which can move in a two dimensional space? Select all that apply. 1. The object is moving. 2. The object is not moving. 3. Assume that x and y directions are perpendicular to each other. The sum of all the forces on the object is zero in the x direction, but not in the y direction. 4. The sum of all the forces on the object is zero in the y direction, but not in the x direction. 5. The sum of all the forces on the object is zero in both the x and y directions, but not necessarily in all other directions.
- QUESTION 22 An elevator is pulled upward at a constant speed by a cable. Which statement is true about the forces acting on the elevator? A. The net force on the elevator is zero. В. B. The upward force by the cable is smaller than the downward force of gravity. C. There is a net upward force on the elevator due to the cable. С. D. The upward force by the cable is greater than the downward force of gravity. E There is a net downward force on the elevator due to gravity. E.1. What is the weight of a car sitting on a 14˚ slope if the force required to push the car up the hill is 750 pounds? 2. A 3,000‐pound car is sitting on a 12˚ slope. Find the magnitude of the force required to keep the car from rolling down the hill and the magnitude of the force perpendicular to the hill. 3. Two people push a 200‐pound box up a ramp. Each person pushes with a force of 75 pounds in the direction of the incline up the ramp, and the box just slides along the ramp. At what angle is the ramp inclined? 4. Determine the work done by a crane lifting a 2400‐pound car 5 feet. 5. A force of 50 pounds, exerted at an angle of 25˚ with the horizontal, is required to slide a desk across the floor. Determine the work done in sliding the desk 15 feet. 6. A force of 600 pounds is required to pull a shipping crate up a ramp inclined at 25˚ from the horizontal. Find the weight of the shipping crate5. A 3 kg book is held against a wall with a force F at an angle of 30° as shown below. The coefficient of friction of the wall with the book is 0.3. A. Draw a free body diagram for the book. B. Determine the minimum force F needed for the book not to slide down the wall.
- 4. In the figure shown, the coefficient of kinetic friction between the block and the incline plane is 0.29. Determine the tension in the string and the magnitude of the acceleration of the suspended block as it falls. Disregard any pulley mass of friction in the pulley. Take M=3 kg 30 M2. A crate is being suspended by two cables as shown in the diagram. Determine the maximum weight of the crate. 50° 500 N Crate 800 N5. You are messing around with two textbooks and you place one on top of the other. You lift the lower book at one side to make a ramp. Draw a free-body diagram for the upper book while the books are still ying flat on the table.- a. There are two forces on the book. top b. Draw a free-body diagram for the upper book while the lower book is at an incline. There are three forces on the top book, now. What happens to the magnitude of the normal force exerted on the upper book once the lower book is lifted? Does it get bigger, smaller, or stay the same? с.