A 1130-kg car is held in place by a light cable on a very smooth (frictionless) ramp, as shown. The cable makes an angle of 31º above the surface of the ramp, and the ramp itself rises at 25.0° above the horizontal. Find the tension in the cable ? A) 4200 N B) 5460 N C) 1009N D) 3500N E) 3200 N
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- PA BY 200 lb -y 2 ft 2 ft 3 ft The slab shown is supported by vertical cables at points A, B, and C. The slab is subjected to a single 200 lb force. The weight of the slab is negligible. Which of the following is closest to the magnitude of the tension in cable B?4. In the following figure, a box of m₂= 2.0 kg appears on an inclined plane with a coefficient of kinetic friction of 0.15 that makes an angle of 30 degrees. It is connected by a string of negligible mass to a box m₁= 0.5 kg lying on a horizontal friction surface with a coefficient of kinetic friction of 0.15. A force of 2.3 N to the right is applied to the box m₁. Determine: a. b. The acceleration of the boxes and the tension in the string. The value of the force applied so that the boxes move at a constant speed. 111 m₂A 500 N block is being pushed along a frictionless horizontal surface by a force of 150 N at 40° to the horizontal. What is the normal force from the surface on the object? A) 96 N B) 150 N C) 404 N D) 500 N E) 596 N 150 N 500 N 40.0°
- Many birds can attain very high speeds when diving. Using radar, scientists measured the altitude of a barn swallow in a vertical dive; it dropped 208 m in 3.0 s. The mass of the swallow was estimated to be 0.018 kg, and its cross-section area as 5.6 x 10-4 m2. What was the drag coefficient for this swallow as it dove?9. A 75 N crate is at rest on an incline that is inclined a 25° above the horizontal. The coefficient of static friction between the crate and the incline is 0.25 and the coefficient of kinetic friction between the crate and the incline is 0.15. (a) What is the minimum magnitude of a force parallel to the incline that will prevent the crate from sliding down the incline? (b) What is the minimum magnitude of the force parallel to the incline that will start the crate to move up the incline? (c) Include a force (or free body) diagram of each situation.A crate remains stationary after it has been placed on a ramp inclined at an angle with the horizontal. Which of the following statements must be true about the magnitude of the frictional force that acts on the crate? O It is least equal to the weight of the crate. O It is equal to n. O It is larger than the weight of the crate. O It is greater than the component of the gravitational force acting down the ramp. O It is equal to the component of the gravitational force acting down the ramp.
- Q4) The Great Valerio is performing his high wire act. He stands on a (massless wire) exactly in the middle of two posts a distance d = 50.1 m apart. The wire buckles under his weight and he ends up h = 1.25 m below the vertical location where %3D the wire is attached to the posts. Valerio has a mass of my= = 73.5 kg. What is the tension of the wire ? h d/2 d/2 E1O C A cart for hauling ore out of a gold mine has a mass of 439 kg , including its load. The cart runs along a straight stretch of B Track track that climbs a shallow 4.75° incline. A donkey, which is Rope trudging along and to the side of the track, has the unenviable job of pulling the cart up the slope with a 441 N force for a distance of 185 m by means of a rope that is parallel to the slope but makes an angle of 14.5° with the track. A „Track incline Model the rolling resistance of the cart as though it were Horizontal ground sliding on the track with a coefficient of friction of 0.0163. Use g = 9.81 m/s, and note that angle A in the image is the angle of the incline while angle B is the angle the rope makes %3D with the track. Find the work Wa that the donkey performs on the cart during this process. %3D Find the work W, that the force of gravity performs on the cart during this process. = "M Calculate the work W done on the cart by friction during this process. 874. A 50.0-kg crate is being pulled along a horizontal smooth sSurface. The pulling force is 10.0 N and is directed 20.0° above the horizontal. What is the magnitude of the acceleration of the crate? A) 0.0684 m/s2 B) 0.188 m/s2 C) 0.200 m/s2 D) 0.376 m/s2 E) 0.0728 m/s2 Final formula: Required steps: 1) Draw free body diagram 2) Choose reference frame 3) Find vectors components 4) Apply Newton's 2nd law 5) Solve for a algebraically 6) Check units 7) Substitute numerical values
- A 35-N crate slides down a frictionless incline that is 25° above the horizontal. The magnitude of the normal force of the incline on the crate is closest to O 11 N 23 N O 32 N non eof the aboveA lead fishing weight of mass 0.20 kg is tied to a fishing line that is 0.50 mm long. The weight is then whirled in a vertical circle. The fishing line will break if its tension exceeds 80 N. A) bottom B)At what speed will the string break?