EBK COLLEGE PHYSICS
2nd Edition
ISBN: 9780134605500
Author: ETKINA
Publisher: PEARSON CO
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Chapter 3, Problem 31P
Aisha throws a
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If the answer is 2.8, -2.8 or -8.4, it is not CORRECT
Three blocks, light connecting ropes, and a light frictionless pulley comprise a system,
as shown in the figure. An external force of magnitude P is applied downward on block A,
causing block A to accelerate downward at a constant 2.5 m/s2. The tension in the rope
connecting block B and block C is equal to 60 N.
(a) What is the magnitude of the force P?
(b) What is the mass of block C?
Current Attempt in Progress
In the figure what is the net electric potential at point P due to the four particles if V = 0 at infinity, q = 2.12 fC, and d = 1.75 cm?
d
Number
MI
Units
+q
Chapter 3 Solutions
EBK COLLEGE PHYSICS
Ch. 3 - Review Question 3.1 How do we determine how many...Ch. 3 - Review Question 3.2 A book bag hanging from a...Ch. 3 - Review Question 3.3 An elevator in a tall office...Ch. 3 - Review Question 3.4 What is the main difference...Ch. 3 - Review Question 3.5 Your friend says that m is a...Ch. 3 - Review Question 3.6 Newton’s second law says that...Ch. 3 - Review Question 3.7 Three friends argue about the...Ch. 3 - Review Question 3.8 Is the following sentence...Ch. 3 - Review Question 3.9 Explain how an air bag and...Ch. 3 - An upward-moving elevator slows to a stop as it...
Ch. 3 - You apply the brakes of your car abruptly and your...Ch. 3 - Which of the statements below explains why a child...Ch. 3 - Which observers can explain the phenomenon of...Ch. 3 - 5. Which vector quantities describing a moving...Ch. 3 - You have probably observed that magnets attract...Ch. 3 - Which of the following velocity-versus-time graphs...Ch. 3 - A book sits on a tabletop. What force is the...Ch. 3 - 9. A spaceship moves in outer space. What happens...Ch. 3 - 10. A 0.10-kg apple falls on Earth, whose mass is...Ch. 3 - 11. A man stands on a scale and holds a heavy...Ch. 3 - You stand on a bathroom scale in a moving...Ch. 3 - A person pushes a 10-kg crate, exerting a 200-N...Ch. 3 - Two small balls of the same material, one of mass...Ch. 3 - 15. A box full of lead and a box of the same size...Ch. 3 -
16. Figure Q3.16 shows an unlabeled force...Ch. 3 - A person jumps from a wall and lands stiff-legged....Ch. 3 - A 3000-kg spaceship is moving away from a space...Ch. 3 - Figure Q3.19 is a velocity-versus-time graph for...Ch. 3 - 20. Explain the purpose of crumple zones, that is,...Ch. 3 - 21. Explain why when landing on a firm surface...Ch. 3 - A small car bumps into a large truck. Compare the...Ch. 3 - 23. You are pulling a sled. Compare the forces...Ch. 3 - 25. You are holding a 100-g apple. (a) What is the...Ch. 3 - 26. You throw a 100-g apple upward. (a) While the...Ch. 3 - After having been thrown upward, a 100-g apple...Ch. 3 - * In Figure P3.1 you see unlabeled force diagrams...Ch. 3 - 2. Draw a force diagram (a) for a bag hanging at...Ch. 3 - 3. For each of the following situations, draw the...Ch. 3 - 4. You hang a book bag on a spring scale and place...Ch. 3 - 5. A block of dry ice slides at constant velocity...Ch. 3 - 6. * You throw a ball upward. (a) Draw a motion...Ch. 3 - 7. A string pulls horizontally on a cart so that...Ch. 3 - 8. * Solving the previous problem, your friend...Ch. 3 - 9. * A string pulls horizontally on a cart so that...Ch. 3 - A block of dry ice slides at a constant velocity...Ch. 3 - 11 .Three motion diagrams for a moving elevator...Ch. 3 - 12. * A student holds a thin aluminum pie pan...Ch. 3 - * Figures P3.11a b, and c show three motion...Ch. 3 - 14. * A train traveling from New York to...Ch. 3 - *Explain the phenomenon of whiplash from two...Ch. 3 - An astronaut exerts a 100-N force pushing a beam...Ch. 3 - 17. Four people participate in a rope competition....Ch. 3 - 18. * Shot put throw During a practice shot put...Ch. 3 - * You know the sum of the forces F exerted on an...Ch. 3 - * You record the displacement of an object as a...Ch. 3 - 25. * Spider-Man Spider-Man holds the bottom of an...Ch. 3 - ** Matt is wearing Rollerblades. Beth pushes him...Ch. 3 - 27. * Stuntwoman The downward acceleration of a...Ch. 3 - EST Estimate the average force that a baseball...Ch. 3 - * Super Hornet jet takeoff A2.1104-kgF-18 Super...Ch. 3 - Lunar Lander The Lunar Lander of mass 2.01024 kg...Ch. 3 - 31. Aisha throws a ball upward Frances, standing...Ch. 3 - Students Lucia. Isabel, and Austin are...Ch. 3 - 33. * Astronaut Karen Nyberg, a 60-kg astronaut,...Ch. 3 - * A 0.10-kg apple falls off a tree branch that is...Ch. 3 - 35. ** An 80-kg fireman slides 5.0 m down a fire...Ch. 3 - * Earth exerts a 1.0-N gravitational force on an...Ch. 3 - * You push a bowling ball down the lane toward the...Ch. 3 - 38. * EST (a) A 50-kg skater initially at rest...Ch. 3 - 39. ** EST Basketball player LeBron James can jump...Ch. 3 - * EST The Scottish Tug of War Association contests...Ch. 3 - Consider the experiment described in Question 3.6...Ch. 3 - 42. * EST A friend drops a 0.625-kg basketball...Ch. 3 - 43 Car safety The National Transportation Safety...Ch. 3 - 44. * A 70-kg person in a moving car stops during...Ch. 3 - BIOESTLeft ventricle pumpingThe lower left chamber...Ch. 3 - Prob. 46GPCh. 3 - 47. ** EST Olympic dive During a practice dive,...Ch. 3 - 49. ** EST You are doing squats on a bathroom...Ch. 3 - ** EST Estimate the horizontal speed of the runner...Ch. 3 - 51. ** EST Estimate the maximum acceleration of...Ch. 3 - ** EST Estimate how much Earth would move during...Ch. 3 - In an early practice run while the rocket sled was...Ch. 3 - What is Stapps67m/sspeed in miles per hour? 30mi/h...Ch. 3 - 55. What is the magnitude of the acceleration of...Ch. 3 - 56. What is the magnitude of the acceleration of...Ch. 3 - What is the average force exerted by the...Ch. 3 - 58. What is the time interval for Stapp and his...Ch. 3 - Using proportions A proportion is defined as an...Ch. 3 - Using proportions A proportion is defined as an...Ch. 3 - Using proportions A proportion is defined as an...Ch. 3 - Using proportions A proportion is defined as an...Ch. 3 - Using proportions A proportion is defined as an...
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- Current Attempt in Progress In the figure what is the net electric potential at point P due to the four particles if V = 0 at infinity, q = 2.12 fC, and d = 1.75 cm? d Number MI Units +qarrow_forwardA 0.500 kg sphere moving with a velocity given by (2.00î – 2.60ĵ + 1.00k) m/s strikes another sphere of mass 1.50 kg moving with an initial velocity of (−1.00î + 2.00ĵ – 3.20k) m/s. (a) The velocity of the 0.500 kg sphere after the collision is (-0.90î + 3.00ĵ − 8.00k) m/s. Find the final velocity of the 1.50 kg sphere. R = m/s Identify the kind of collision (elastic, inelastic, or perfectly inelastic). ○ elastic O inelastic O perfectly inelastic (b) Now assume the velocity of the 0.500 kg sphere after the collision is (-0.250 + 0.850ĵ - 2.15k) m/s. Find the final velocity of the 1.50 kg sphere. ✓ = m/s Identify the kind of collision. O elastic O inelastic O perfectly inelastic (c) Take the velocity of the 0.500 kg sphere after the collision as (−1.00ỉ + 3.40] + ak) m/s. Find the value of a and the velocity of the 1.50 kg sphere after an elastic collision. (Two values of a are possible, a positive value and a negative value. Report each with their corresponding final velocities.) a…arrow_forwardA cannon is rigidly attached to a carriage, which can move along horizontal rails, but is connected to a post by a large spring, initially unstretched and with force constant k = 1.31 x 104 N/m, as in the figure below. The cannon fires a 200-kg projectile at a velocity of 136 m/s directed 45.0° above the horizontal. 45.0° (a) If the mass of the cannon and its carriage is 5000 kg, find the recoil speed of the cannon. m/s (b) Determine the maximum extension of the spring. m (c) Find the maximum force the spring exerts on the carriage. (Enter the magnitude of the force.) Narrow_forward
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- Make sure to draw a sketch AND draw a Free body diagramarrow_forwardP -3 ft 3 ft. O A B 1.5 ft Do 1.5 ft ✓ For the frame and loading shown, determine the magnitude of the reaction at C (in lb) if P = 55 lb. (Hint: Use the special cases: Two-force body and Three-force body.)arrow_forwardA convex mirror (f.=-6.20cm) and a concave minor (f2=8.10 cm) distance of 15.5cm are facing each other and are separated by a An object is placed between the mirrors and is 7.8cm from each mirror. Consider the light from the object that reflects first from the convex mirror and then from the concave mirror. What is the distance of the image (dia) produced by the concave mirror? cm.arrow_forward
- An amusement park spherical mirror shows park spherical mirror shows anyone who stands 2.80m in front of it an upright image one and a half times the person's height. What is the focal length of the minor? m.arrow_forwardAn m = 69.0-kg person running at an initial speed of v = 4.50 m/s jumps onto an M = 138-kg cart initially at rest (figure below). The person slides on the cart's top surface and finally comes to rest relative to the cart. The coefficient of kinetic friction between the person and the cart is 0.440. Friction between the cart and ground can be ignored. (Let the positive direction be to the right.) m M (a) Find the final velocity of the person and cart relative to the ground. (Indicate the direction with the sign of your answer.) m/s (b) Find the friction force acting on the person while he is sliding across the top surface of the cart. (Indicate the direction with the sign of your answer.) N (c) How long does the friction force act on the person? S (d) Find the change in momentum of the person. (Indicate the direction with the sign of your answer.) N.S Find the change in momentum of the cart. (Indicate the direction with the sign of your answer.) N.S (e) Determine the displacement of the…arrow_forwardSmall ice cubes, each of mass 5.60 g, slide down a frictionless track in a steady stream, as shown in the figure below. Starting from rest, each cube moves down through a net vertical distance of h = 1.50 m and leaves the bottom end of the track at an angle of 40.0° above the horizontal. At the highest point of its subsequent trajectory, the cube strikes a vertical wall and rebounds with half the speed it had upon impact. If 10 cubes strike the wall per second, what average force is exerted upon the wall? N ---direction--- ▾ ---direction--- to the top to the bottom to the left to the right 1.50 m 40.0°arrow_forward
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