College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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- A 24.0-kg box is released on a 27° incline and accelerates down the incline at 0.30 m/s² ▼ Part A Find the friction force impeding its motion. Express your answer to two significant figures and include the appropriate units. Ffr = 21 F Part B Submit Previous Answers Request Answer X Incorrect; Try Again μA Submit k = 17.5 m Determine the coefficient of kinetic friction. Express your answer using two significant figures. 15. ΑΣΦ ? Previous Answers Request Answer ?arrow_forwardA 9.80-kg hanging object is connected by a light, inextensible cord over a light, frictionless pulley to a 5.00-kg block that is sliding on a flat table. Taking the coefficient of kinetic friction as 0.218, find the tension in the string. (The block slides to the right in the diagram below.) N m₁ mąarrow_forwardm1 m2 F. m3 Three blocks are placed in contact with each other and their masses are ml = 10.9 kg, m2 = 20.9 kg, and m3 = 30.9 kg. The coefficients of kinetic and static friction between each pair of the surfaces in contact are 0.600 and 0.650, respectively. A horizontal pull F = 540 N to the right is exerted on the bottom block as shown in the figure. All the three blocks move together. Find the magnitude and direction of friction force on the top block m1. (g = 10.0 m/s² )(q1510)arrow_forward
- Plz use g = 9.8 m/s2arrow_forwardAsaparrow_forward2. A two body system is set up on an inclined surface with M = 5 kg and m = 4 kg. The angle is 25 degrees. And the static frictional coefficient is 0.25, and kinetic frictional coefficient is 0.20. i. Find the parallel and perpendicular components of the Mg. ii. Find the static frictional force and kinetic frictional force. iii. Determine which way the system will move, uphill or downhill. iv. Once it starts, find the tension T =? v. Once it starts, find the acceleration, a=?arrow_forward
- Two blocks are joined by an inextensible cable as shown. If the system is released from rest, determine the velocity of block A after it has moved 2 m. Assume that the coefficient of kinetic friction between block A and the plane is 0.25 and that the pulley is weightdess and frictionless. 200 kg ㄱ 300 kg A Barrow_forwardAnswer Saved Suppose the roller skating woman has a mass of 41.3 kg. Her roller blades have a coefficient of kinetic friction 4g = 0.0306 with respect to the street. She approaches the car, slowing to a speed of v = 6.23 m/s when she touches the car. If the average force she exerts to slow herself down has a magnitude of F = 68.3 N how long does it take for her to come to a stop?arrow_forwardA 40 N box is resting on a table when a 20 N force is applied to it horizontally. The coefficients of static and kinetic friction are 0.3 and 0.1, respectively. Which of the following best describes the resulting motion of the box? The motion of the box cannot be determined with the given information. The box accelerates in the direction of the applied force. The box remains at rest. The box moves with a constant velocity in the direction of the applied force.arrow_forward
- A rancor pulls a 89.6 kg box at a constant speed across the floor. He applies a 328.2 N force at an angle of 34.3° above the horizontal. What is the coefficient of kinetic friction? Use g=9.8m/sarrow_forwardpls help not in scientific notation plsarrow_forward1O 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. 87arrow_forward
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