Problem 1RQ: Review Question 4.1 When does a vector have a positive scalar component? When does a vector have a... Problem 2RQ: Review Question 4.2 The x- and y-components of Newtons second law for a specific scenario are:... Problem 3RQ: Review Question 4.3 What is the force of friction that the floor exerts on your refrigerator? Assume... Problem 4RQ: Review Question 4.4 For problems involving objects moving upward or downward along inclined... Problem 5RQ: Review Question 4.5 Why do we need to resolve the initial velocity of a projectile into components... Problem 6RQ: Review Question 4.6
You read in this section that it is the road and not the engine that is most... Problem 1MCQ: 1. A car accelerates along a road. Identify the best combination of forces exerted on the car in the... Problem 2MCQ: 2. A person pushes a 10-kg crate exerting a 200-N force on it, but the crate’s acceleration is only... Problem 3MCQ: Compare the ease of pulling a lawn mower and pushing it. a. They are the same. b. Pulling is easier.... Problem 4MCQ: 4. You simultaneously release two balls: one you throw horizontally, and the other you drop straight... Problem 5MCQ: You shoot an arrow with a bow. The following is Newtons second law applied for one of the instants... Problem 6MCQ: In what reference frame does a projectile launched at speed v0 at angle above the horizontal move... Problem 7MCQ: In Table 4.6 we found that the two balls touched the ground at the same time. Which of the following... Problem 8MCQ: 8. While running at constant velocity, how should you throw a ball with respect to you so that you... Problem 9MCQ: 9. You hold a block on a horizontal, frictionless surface. It is connected by a string that passes... Problem 10MCQ: 10. In the process described in the previous question, what is the magnitude of the force exerted by... Problem 11MCQ: Suppose that two blocks are positioned on an Atwood machine so that the block on the right of mass... Problem 12MCQ: 12. A box containing some stones is resting on a rough inclined surface. Which of the following... Problem 13MCQ: For the following two questions, the answer options are the same. Select two correct answers for... Problem 14MCQ: 14. A block is resting on a rough inclined surface. You observe that by increasing the angle of the... Problem 15CQ:
15. A box with a heavy television set in it us placed against a box with a toaster oven in it.... Problem 16CQ: 16. How can an Atwood machine be used to determine the acceleration of freely falling objects if... Problem 17CQ: 17. Your friend is on Rollerblades holding a pendulum You gently push her forward and let go You... Problem 18CQ: Explain why a car starts skidding when a driver abruptly applies the brakes. Problem 19CQ: 19. Explain why old tires need to be replaced.
Problem 20CQ: 20. Explain how friction helps you to walk.
Problem 21CQ: 21. Explain why you might fall forward when you stumble.
Problem 22CQ: Explain why you might fall backward when you slip. Problem 23CQ: Explain why the tires of your car can spin out when you are caught in the mud. Problem 24CQ: You throw two identical balls simultaneously at the same initial speed one downward and the other... Problem 25CQ: 25. Your friend says that the vertical force exerted on a projectile when at the top of its flight... Problem 26CQ: Your friend says that a projectile launched at an angle relative to the horizontal moves forward... Problem 27CQ: An object of mass m1 placed on an inclined plane (angle relative to the horizontal) is connected by... Problem 28CQ: 28 An object of mass m1 placed on an inclined plane (angle relative to the horizontal) is connected... Problem 29CQ: 29. A horse is pulling a sled. If the force exerted by the horse on the sled has the same magnitude... Problem 30CQ: 30. If you kick a block so that it starts moving up a rough incline, you observe that the... Problem 1P: Determine the x- and y-components of each force vector shown in Figure P4.1.
Problem 2P: 2. Determine the x- and y-components of each force vector shown in Figure P4.2.
Problem 3P: * Determine the x- and y-components of each displacement shown in Figure P4.3. Problem 4P: 4 * The x- and y-components of several unknown forces are listed below (Fx,Fy). For each force, draw... Problem 5P: * The x- and y-scalar components of several unknown forces are listed below (Fx,Fy). For each force,... Problem 6P: 6. * Three ropes pull on a knot shown in Figure P4.6a. The knot is not accelerating. A partially... Problem 7P: * Figure P4.7 shows an unlabeled force diagram for a hockey puck. The length of the sides of the... Problem 8P: For each of the following situations, draw the forces exerted on the moving object and identify the... Problem 9P: * Write Newtons second law in component form for each of the situations described in Problem 4.8. Problem 10P: For the situations described here, construct a force diagram for the block, sled, and skydiver. (a)... Problem 11P: * Write Newtons second law in component form for each of the situations described in Problem 4.10. Problem 12P: Apply Newtons second law in component form for the force diagram shown in Figure P4.1. Problem 13P: Apply Newtons second law in component form for the force diagram shown in Figure P4.2. Problem 14P: 14. * Equation Jeopardy 1 The three sets of equations below are the horizontal x- and vertical... Problem 15P: * You exert a force of 100 N on a rope that pulls a sled across a very smooth surface. The rope is... Problem 16P: 16. * You exert a force of a known magnitude F on a grocery cart of total mass m. The force you... Problem 17P: * Olympic 100-m dash start At the start of his race, 86-kg Olympic 100-m champion Usain Bolt from... Problem 18P: 18. * Your own accelerometer A train has an acceleration of magnitude while stopping. A pendulum... Problem 19P: * EST Finn and Hazel are using a battery-powered fan fixed on a low-friction cart. As the fan blades... Problem 20P: A 91.0-kg refrigerator sits on the floor. The coefficient of static friction between the... Problem 21P: A 60-kg student sitting on a hardwood floor does not slide until pulled by a 240-N horizontal force.... Problem 22P: Car stopping distance and friction A car traveling at 60 mi /h (97 km /h) can stop in 48 m on a... Problem 23P: 23. * A 50-kg box rests on the floor. The coefficients of static and kinetic friction between the... Problem 24P: 24. * Marsha is pushing down and to the right on a 12-kg box at an angle of below horizontal The... Problem 25P: * You want to determine the coefficient of kinetic friction between a 1m1m rug and a wooden floor.... Problem 26P: * A wagon is accelerating to the right. A book is placed against the interior back wall of the wagon... Problem 27P: s. Determine an expression for the minimum acceleration of the wagon in terms of s so that the book... Problem 28P: * A car has a mass of 1520 kg. While traveling at 20 m/s, the driver applies the brakes to stop the... Problem 29P: m/s2 when pulled by a rope exerting a 120-N force on the wagon at an angle of 25 above the... Problem 30P: 30. ** A crate of mass m sitting on a horizontal floor is attached to a rope that pulls at an angle ... Problem 31P: * EST You absentmindedly leave your book bag on the top of your car. Estimate the safe acceleration... Problem 32P: 32. * Block 1 is on a horizontal surface with a 0.29 coefficient of kinetic friction between it and... Problem 33P: 33. * You want to use a rope to pull a 10-kg box of books up a plane inclined above the horizontal.... Problem 34P: 34. * A car with its wheels locked rests on a flatbed of a tow truck. The flatbed's angle with the... Problem 35P: 35. Olympic skier Olympic skier Tina Maze skis down a steep slope that descends at an angle of ... Problem 36P: * Another Olympic skier Bode Miller. 80-kg downhill skier, descends a slope inclined at 20.... Problem 37P: * A book slides off a desk that is tilted 15 relative to the horizontal. What information about the... Problem 39P: * Helge, Steve, and Heidi are sitting on a sled on a slope covered with a hard snow. The sled is... Problem 40P: 40. * When traveling on an airplane you get meals on a serving tray that has large coefficients of... Problem 41P: 41. Skier A 52-kg skier starts at rest and slides 30 m down a hill inclined at relative to the... Problem 42P: 42. * Ski rope tow You agree to build a backyard rope tow to pull your siblings up a 20-m slope that... Problem 43P: 43. * Soapbox racecar A soapbox derby racecar starts at rest at the top of a 301-m-long track tilted... Problem 44P: 44. * A person is pushing two carts that are connected with a metal bar so that the carts are moving... Problem 45P: 45. * BIO Whiplash Experience A car sitting at rest is hit from the rear by a semi-trailer truck... Problem 46P: Iditarod race practice The dogs of four-time Iditarod Trail Sled Dog Race champion Jeff King pull... Problem 47P: angle above the horizontal. The other end of the rope is attached to the front of the first of two... Problem 48P: * Rope 1 pulls horizontally, exerting a force of 45 N on an 18-kg wagon attached by a second... Problem 49P: * Three sleds of masses m1,m2,m3 are on a smooth horizontal surface (Ice) and connected by ropes, so... Problem 50P: 50. ** Repeat Problem 4.49 , only this time with the sleds on a slope inclined at
Problem 51P: 51. * A skier is moving down a snowy hill with an acceleration of . The angle of the slope is to... Problem 52P: ** A person holds a 200-g block that is connected to a 250-g block by a string going over a light... Problem 53P: 53. ** Two blocks of masses are connected to each other on an Atwood machine. A person holds one of... Problem 54P: 54. ** The 20-kg block shown in Figure P4.54 accelerates down and to the left, and the 10-kg block... Problem 55P: * A squirrel jumps of a roof in the horizontal direction. The origin of the coordinate system is at... Problem 56P: * A frog jumps at an angle 30 above the horizontal. The origin of the coordinate system is at the... Problem 57P: 57. A bowling ball rolls off a table. Draw a force diagram for the ball when on the table and when... Problem 58P: 58 * A tennis ball is served from the back line of the court such that it leaves the racket 2.4 m... Problem 59P: 59. * Equation Jeopardy 3 The equations below describe a projectile’s path. Solve for the unknowns... Problem 60P: 60 * EST An airplane is delivering food to a small island It flies 100 m above the ground at a speed... Problem 61P: A ball moves in an arc through the air (see Figure P4.61) Construct a force diagram for the ball... Problem 62P: A marble is thrown as a projectile at an angle above the horizontal. Draw its path during the flight... Problem 63P: 63 * Marbles are exiting a container through a horizontal nozzle positioned 1.3 m above sandy ground... Problem 64P: * Robbie Knievel ride On May 20, 1999, Robbie Knievel easily cleared a narrow part of the Grand... Problem 65P: 65. * Daring Darless wishes to cross the Grand Canyon of the Snake River by being shot from a... Problem 66P: * A football punter wants to kick the ball so that it is in the air for 4.0 s and lands 50 m from... Problem 67P: 67. * If you shoot a cannonball from the same cannon first at and then at relative to the... Problem 68P: 68. When you actually perform the experiment described in Problem 4.67 , the ball shot at a angle... Problem 69P: 69. * You can shoot an arrow straight up so that it reaches the top of a 25-m-tall building. (a) How... Problem 70P: 70. * Robin Hood wishes to split an arrow already in the bull's-eye of a target 40 m away. If he... Problem 71P: 71. * Three force diagrams for a car on a road are shown in Figure P4.71 Indicate as many situations... Problem 72P: * A minivan of mass 1560 kg starts at rest and then accelerates at 2.0m/s2. (a) What is the object... Problem 74GP: 74. * Emily pulls a 5-kg block across a rough horizontal surface, exerting a constant force on the... Problem 75GP: 75. * EST You abruptly push a 1.7-kg book along a table and let go. The book comes to a stop after a... Problem 76GP: 76 ** EST In the situation of Problem 4.75, estimate (a) the maximum speed of the book and (b) the... Problem 78GP: 78. * Two blocks of masses and hang at the ends of a string that passes over the very light pulley... Problem 79GP: 79. * A 3.5-kg object placed on an Inclined plane (angle above the horizontal) is connected by a... Problem 80GP: above the horizontal) is connected by a string going over a pulley to a 1.0-kg object. Determine the... Problem 81GP: above the horizontal) is connected by a string going over a pulley to a hanging object of mass m2.... Problem 82GP: 82 ** You are driving at a reasonable constant velocity in a van with a windshield tilted relative... Problem 84GP: 84. * In the situation of Problem 2.71 (Chapter 2 ) and using the data in the accompanying table,... Problem 87GP: 87. * Your friend has a pie on the roof of his van. You are standing on the ground and observe the... Problem 88GP: * A ledge on a building is 20 m above the ground. A taut rope attached to a 4.0-kg can of paint... Problem 89GP: 89. * You are hired to devise a method to determine the coefficient of friction between the ground... Problem 90GP: The mass of a spacecraft is about 480 kg. An engine designed to increase the speed of the spacecraft... Problem 91GP: incline When she reaches the level floor at the bottom, she applies the brakes. Use Newton's second... Problem 93GP: * Tell all A sled starts at the top of the hill shown in Figure P4.93. Add any information that you... Problem 94RPP: Professor tests airplane takeoff speed D. A. Wardle, a professor of physics from the University of... Problem 95RPP: Professor tests airplane takeoff speed D A Wardle, a professor of physics from the University of... Problem 96RPP: Professor tests airplane takeoff speed D A Wardle, a professor of physics from the University of... Problem 97RPP: Professor tests airplane takeoff speed D. A. Wardle, a professor of physics from the University of... Problem 98RPP: Choose the best velocity-versus-time graph below for the airplane (FigureP4.98). Problem 99RPP: Ski jumping in Vancouver The 2010 Olympic ski jumping competition was held at Whistler Mountain near... Problem 100RPP: Ski jumping in Vancouver The 2010 Olympic ski jumping competition was held at Whistler Mountain near... Problem 101RPP: Ski jumping in Vancouver The 2010 Olympic ski jumping competition was held at Whistler Mountain near... Problem 102RPP: Assume that the skier left the ramp moving horizontally. Treat the skier as a point-like particle... Problem 103RPP: Ski jumping in Vancouver The 2010 Olympic ski jumping competition was held at Whistler Mountain near... format_list_bulleted