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Transcribed Image Text:2. A 10-kg box of books is initially at rest on a horizontal surface. A horizontal force of 60.0 N
is required to set the box in motion and a horizontal force of 50 N is required to keep the block
moving with constant speed. What will be the acceleration of the box if a force of 60.0 N is
constantly applied after it moves?
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Step 1
Given,
Mass of box (m) = 10kg
Box moves with constant speed if applied horizontal force is equal to 50 N
We want to find acceleration of box when applied horizontal force is equal to 60N
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- 60. An 8.0-kilogram block and a 2.0-kilogram block rest on a horizontal frictionless surface. When horizontal force F is applied to the 8.0-kilogram block, it accelerates at 5.0 meters per second east. If the same force was applied to the 2.0-kilogram block, the magnitude of the block's acceleration would be (1) 1.3 m/s2 (2) 2.5 m/s2 (3) 10. m/s2 (4) 20. m/s SHOW WORK, CIRCLE ANSWER, WRITE NEATarrow_forward1. Two blocks are positioned on surfaces, each inclined at the same angle of 42.8 degrees with respect to the horizontal. The blocks are connected by a rope which rests on a frictionless pulley at the top of the inclines as shown, so the blocks can slide together. The mass of the black block is 2.07 kg, and the coefficient of kinetic friction for both blocks and inclines is 0.510. Assume static friction has been overcome and that everything can slide. What is must be the mass of the white block if both blocks are to slide to the LEFT at an acceleration of 1.5 m/s^2? 2. Two blocks are positioned on surfaces, each inclined at the same angle of 49.5 degrees with respect to the horizontal. The blocks are connected by a rope which rests on a frictionless pulley at the top of the inclines as shown, so the blocks can slide together. The mass of the black block is 2.24 kg, and this time there is NO friction. What is must be the mass of the white block if both blocks are to slide to the LEFT at…arrow_forward9. Two blocks are positioned on surfaces, each inclined at the same angle of 58.3 degrees with respect to the horizontal. The blocks are connected by a rope which rests on a frictionless pulley at the top of the inclines as shown, so the blocks can slide together. The mass of the black block is 3.66 kg, and the coefficient of kinetic friction for both blocks and inclines is 0.460. Assume static friction has been overcome and that everything can slide. What is must be the mass of the white block if both blocks are to slide to the LEFT at an acceleration of 1.5 m/s^2? 2.16 kg 9.99 kg 6.02 kg 3.06 kgarrow_forward
- 7. If we know an object is moving at constant velocity, then we can be certain... the net force acting on the object is zero. the object is losing mass. the object is accelerating. there are no forces acting on the object.arrow_forward5. A 76.0-kg person stands on a bathroom scale that is on the floor in an elevator. The scale reads 958 N. Which of the following situations could possibly cause this reading? (1) The elevator is moving upward while its speed is increasing. (2) The elevator is moving upward while its speed is decreasing. (3) The elevator is moving downward while its speed is increasing. (4) The elevator is moving downward while its speed is decreasing.arrow_forward1. A 100-g box slides across a frictionless horizontal plane and is accelerating at 15 m/s2. What is the opposing force needed to reduce the acceleration to 5 m/s2. Note that the question is asking for the opposing force to the original force, NOT the resultant force that results to 5 m/s2.arrow_forward
- 4. The 100-kg crate is subjected to the forces shown. If it is originally at rest, determine the distance it slides in order to attain a speed of v= 6 m/s. The coefficient of kinetic friction between the crate and the surface is Hk = 0.2. 500 N 400 N 30° 45°arrow_forward5. Consider a box with a mass of 10 kg on a rough, horizontal surface. Again all forces and motion occur in the xy plane where the x axis represents the horizontal direction and the y axis represents the vertical direction. A force F is applied on the box at an angle of 0 measured counterclockwise with respect to the x axis. (a) Assume that the magnitude of F is 10 N, 0 = 45°, and the box is at rest. Draw the free-body diagram of the box. Show the numerical value of each force. (b) Let us assume that with the conditions given in (a), the box is just about to slip. Calculate the coefficient of static friction. (c) Now assume that the magnitude of F remains 10 N, but 0 = 30°. Will the box slip? Show your steps/Explain your answer.arrow_forward7. A mass m₁ = 5.00 kg is connected by a light string that passes over a pulley of mass m3 = 8.0 kg to a mass m2 8.50 kg sliding on a frictionless inclined surface that makes an angle of 23° with the horizontal (see figure). The coefficient of kinetic friction between the mass m₁ and the horizontal surface is 0.19. There is no slippage between the string and the pulley. What is the magnitude of the acceleration of the system? (The moment of inertia of the pulley is 1/2Mr².) m/s² m₂ m3 = m₁arrow_forward
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