University:
Kentucky State University
Course:
PHY 211 | General Physics I
Academic year:

2024
Views:

421

Pages:

2
Author:

marthamanayay9qr10

**Useful Information** 1. A 0.600 kg particle has a speed of 7.20 m/s at point A and kinetic energy of 2.50 J at point B. What is the net work done on the particle by the external forces as it moves from A to B? A) 6.30 J B) -1.20 J C) 5.00 J D) -6.30 J E) 1.20 J 2. In the figure, block A has a mass of 3.00 kg. It rests on a smooth horizontal table and is connected by a very light horizontal string over an ideal pulley to block B, which has a mass of 2.00 kg. When block B is gently released from rest, how long does it take block B to travel 40.0 cm? [Image of a pulley system with two blocks] A) 0.404 s B) 0.785 s C) 0.639 s D) 0.935 s E) 0.452 s 3. A 5.0-kg box slides down an inclined plane that makes an angle of 39° with the horizontal. If the coefficient of kinetic friction is 0.19, what is the acceleration of the box? A) 3.7 m/s² B) 3.4 m/s² C) 3.1 m/s² D) 4.1 m/s² E) 4.7 m/s² 4. A ball is thrown downward from the top of a building with an initial speed of 20 m/s. It strikes the ground after 2.0 s. How high is the building, assuming negligible air resistance? A) 60 m B) 20 m C) 30 m D) 70 m E) 40 m 5. A car is traveling south at 17.7 m/s. After 12 s its velocity is 14.1 m/s in the same direction. Find the magnitude and direction of the car's average acceleration. A) 0.30 m/s², north B) 2.7 m/s², south C) 0.30 m/s², south D) 2.7 m/s², north E) 0 6. Which of the following situations is impossible? A) An object has velocity directed east and acceleration directed west. B) An object has constant non-zero velocity and changing acceleration. C) An object has velocity directed east and acceleration directed east. D) An object has zero velocity but non-zero acceleration. E) An object has constant non-zero acceleration and changing velocity. **7. A box weighing 700 N rests on a table. A rope tied to the box goes vertically upward over a pulley, and a weight is hung from the other end (as shown in the figure). Determine the force that the table exerts on the box if the weight hanging on the other side of the pulley is 400 N.** [Image of a box on a table with a rope and pulley system] **A) 470 N** B) 700 N C) 300 N D) 0 N E) 400 N **8. The magnitudes of the forces as shown in the figure are: F₁ = 800 N, F₂ = 1200 N, and F₃ = 400 N. The magnitude of the resultant force acting on the particle O is:** [Image of a force diagram with three forces acting on a point] A) 600 N B) 200 N **C) 40 N** D) 100 N E) 18 N **9. The figure shows a system consisting of three blocks, a light frictionless pulley, and light connecting ropes that act horizontally on the upper two blocks. The 2.7 kg block is on a perfectly smooth horizontal table. The surfaces of the 12 kg block are rough, with μ = 0.40 between the 12 kg and 90 kg blocks. The mass of the hanging block is set so that it descends at a constant velocity of 0.420 m/s. What is the mass M of the hanging block?** [Image of a pulley system with three blocks] A) 8.4 kg B) 21 kg C) 4.8 kg **D) 3.6 kg** E) 9.0 kg **10. An object is under the influence of a force as represented by the force vs. position graph below. What is the work done as the object moves from x = 1 m to x = 12 m?** [Image of a force-position graph] A) 30 J B) 20 J **C) 40 J** D) 45 J E) 50 J

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