Problem 1CQ: If you drop your Keys, their momentum increases as they fall. Why is the momentum of the Keys not... Problem 2CQ: By what factor does an objects kinetic energy change if its speed is doubled? By what factor does... Problem 3CQ: A system of particles is known to have zero kinetic energy. What can you say about the momentum of... Problem 4CQ: A system of particles is known to have zero momentum. Does it follow that the Kinetic energy of the... Problem 5CQ: On a calm day you connect an electric fan to a battery on your sailboat and generate a breeze. Can... Problem 6CQ: Crash statistics show that it is safer to be riding in a heavy car in an accident than in a light... Problem 7CQ: (a) As you approach a stoplight, you apply the brakes and bring your car to rest. What happened to... Problem 8CQ: An object at rest on a frictionless surface is struck by a second object. Is it possible for both... Problem 9CQ: (a) Can two objects on a horizontal frictionless surface have a collision in which all the initial... Problem 10CQ: Two cars collide at an intersection. If the cars do not stick together, can we conclude that their... Problem 11CQ: At the instant a bullet is fired from a gun, the bullet and the gun have equal and opposite momenta.... Problem 12CQ Problem 13CQ: In the classic movie The Spirit of St. Louis, Jimmy Stewart portrays Charles Lindbergh on his... Problem 14CQ: A tall, slender drinking glass with a thin base is initially empty. (a) Where is the center of mass... Problem 15CQ Problem 16CQ Problem 1PCE: What is the mass of a mallard duck whose speed is 8.9m/s and whose momentum has a magnitude of 11... Problem 2PCE: (a) What is the magnitude of the momentum of a 0.0053-kg marble whose speed is 0.65 m/s? (b) What is... Problem 3PCE: A 54 kg person walks due north with a speed of 1.2 m/s, and her 6.9 kg dog runs directly toward her,... Problem 4PCE: A 26.2-kg dog is running northward at 2.70 m/s, while a 5.30-kg cat is running eastward at 3.04 m.s.... Problem 5PCE: Predict/Calculate Two air-track carts move toward one another on an air track. Cart 1 has a mass of... Problem 6PCE: A 0.145-kg baseball is dropped from rest. If the magnitude of the baseballs momentum is 1.55 kg.m/s... Problem 7PCE: A 285-g ball falls vertically downward, hitting the floor with a speed of 2.5m/s and rebounding... Problem 8PCE: Object 1 has a mass m1 and a velocity v1=(2.80m/s)x. Object 2 has a mass m2 and a velocity... Problem 9PCE: Your car rolls slowly in a parking lot and bangs into the metal base of a light pole. In terms of... Problem 10PCE: Predict/Explain A net force of 200 N acts on a 100-kg boulder, and a force of the same magnitude... Problem 11PCE: Predict/Explain Referring to the previous question, (a) is the change in the boulders speed in one... Problem 12PCE: Predict/Explain Two identical cars, each traveling at 16 m/s slam into a concrete wall and come to... Problem 13PCE: Force A has a magnitude F and acts for the time t force B has a magnitude 2F and acts for the time... Problem 14PCE: Find the magnitude of the impulse delivered to a soccer ball when a player kicks it with a force of... Problem 15PCE: A 0.45-kg croquet ball is initially at rest on the grass. When the ball is struck by a mallet, the... Problem 16PCE: When spiking a volleyball, a player changes the velocity of the ball from 4.2 m/s to 24 m/s; along a... Problem 17PCE: Force Platform A force platform measures the horizontal force exerted on a persons foot by the... Problem 18PCE: Air Bag Safety If a driver makes contact with a steering wheel during a 35-mph crash, she comes to... Problem 19PCE: To make a bounce pass, a player throws a 0.60-kg basketball toward the floor. The ball hits the... Problem 20PCE: BIO Concussion Impulse One study suggests that a brain concussion can occur if a persons head is... Problem 21PCE: Predict/Calculate A 0.14-kg baseball moves toward home plate with a velocity vi=(36m/s)x. After... Problem 22PCE: A player bounces a 0.43-kg soccer ball off her head, changing the velocity of the ball... Problem 23PCE: Two ice skaters stand at rest in the center of an ice rink. When they push off against one another... Problem 24PCE: A 0.042-kg pet lab mouse sits on a 0.35-kg air-track cart, as shown in Figure 9-27. The cart is at... Problem 25PCE: An object initially at rest breaks into two pieces as the result of an explosion. One piece has... Problem 26PCE: A 92-kg astronaut and a 1200-kg satellite are at rest relative to the space shuttle. The astronaut... Problem 27PCE: The recoil of a shotgun can be significant. Suppose a 3.3-kg shotgun is held tightly by an arm and... Problem 28PCE: A plate drops onto a smooth floor and shatters into three pieces of equal mass. Two of the pieces go... Problem 29PCE: Suppose the car in Example 9-13 has an initial speed of 20.0 m/s and that the direction of the... Problem 30PCE: Two 78.5-kg hockey players skating at 4.47 m/s collide and stick together. If the angle between... Problem 31PCE: An air-track cart with mass m1 = 0.32 kg and initial speed v0 = 0.85m/s collides with and sticks to... Problem 32PCE: Predict/Calculate A bullet with a mass of 4.0 g and a speed of 650 m/s is fired at a block of wood... Problem 33PCE: BIO Concussion Recoil The human head can be considered as a 3.3-kg cranium protecting a 1.5-kg... Problem 34PCE: Two objects moving with a speed v travel in opposite directions in a straight line. The objects... Problem 35PCE: In the apple-orange collision in Example 9-16, suppose the final velocity of the orange is 1.03 m/s... Problem 36PCE: A732-kg car stopped at an intersection is rear-ended by a 1720-kg truck moving with a speed of 15.5... Problem 37PCE: The collision between a hammer and a nail can be considered to be approximately elastic. Calculate... Problem 38PCE: Predict/Calculate A charging bull elephant with a mass of 5240 kg comes directly toward you with a... Problem 39PCE Problem 40PCE: The three air carts shown in Figure 9-28 have masses reading from loft to right, of 4m, 2m, and m,... Problem 41PCE: An air-track cart with mass m =0.25 kg and speed v0 = 1.2 m/s approaches two other carts that are at... Problem 42PCE: Predict/Explain A stalactite in a cave has drops of water falling from it to the cave floor below.... Problem 43PCE Problem 44PCE: Find the x coordinate of the center of mass of the bricks shown in Figure 9-31. Problem 45PCE Problem 46PCE: A pencil standing upright on its eraser end falls over and lands on a table As the pencil falls its... Problem 47PCE Problem 48PCE: The location of the center of mass of the partially eaten, 12-inch-diameter pizza shown in Figure... Problem 49PCE: The Center of Mass of Sulfur Dioxide Sulfur dioxide (SO2) consists of two oxygen atoms (each of mass... Problem 50PCE Problem 51PCE: A 0 726-kg rope 2 00 meters long lies on a floor You grasp one end of the rope and begin lifting it... Problem 52PCE Problem 53PCE Problem 54PCE: Helicopter Thrust During a rescue operation, a 5300-kg helicopter hovers above a fixed point. The... Problem 55PCE: Rocks for a Rocket Engine A child sits in a wagon with a pile of 0 34-kg rocks. If she can throw... Problem 56PCE: A 57.8-kg person holding two 0.880-kg bricks stands on a 2.10-kg skateboard Initially the skateboard... Problem 57PCE: A fire hose can expel water at a rate of 9.5 kg/s (150 gallons/minute) with a speed of 24m/s. How... Problem 58PCE: A 0 540-kg bucket rests on a scale Into this bucket you pour sand at the constant rate of 56.0 g/s... Problem 59PCE: Predict/Calculate Holding a long rope by its upper end, you lower it onto a scale The rope has a... Problem 60GP: CE Object A has a mass m, object B has a mass 2m, and object C has a mass m/2 Rank these objects in... Problem 61GP: CE Object A has a mass m, object B has a mass 4m, and object C has a mass m/4 Rank these objects in... Problem 62GP: CE A juggler performs a series of tricks with three bowling balls while standing on a bathroom... Problem 63GP: A golfer attempts a birdie putt, sending the 0 045-kg ball toward the hole with a speed of 1.2 m/s... Problem 64GP: Predict/Calculate Two trucks drive directly away from one another on a straight line, as indicated... Problem 65GP Problem 66GP: A 1 35-kg block of wood sits at the edge of a table, 0 782 m above the floor A 0.0105-kg bullet... Problem 67GP: In a stunt, three people jump off a platform and fall 9.9 m onto a large air bag A fourth person at... Problem 68GP: Predict/Calculate The carton of eggs shown in Figure 9-39 is filled with a dozen eggs, each of mass... Problem 69GP: The Force of a Storm During a severe storm in Palm Beach, FL, on January 2, 1999, 31 inches of rain... Problem 70GP: An experiment is performed in which two air carts collide on an air track Position versus-time data... Problem 71GP: Figure 9-40 shows position-versus-time data from an experiment in which two air carts collide on an... Problem 72GP: To balance a 35.5-kg automobile tire and wheel, a mechanic must place a 50.2-g lead weight 25.0 cm... Problem 73GP: A hoop of mass M and radius R rests on a smooth, level surface The inside of the hoop has ridges on... Problem 74GP: Predict/Calculate A 63-kg canoeist stands in the middle of her 22-kg canoe The canoe is 30 m long,... Problem 75GP Problem 76GP: A young hockey player stands at rest on the ice holding a 1 3-kg helmet The player tosses the helmet... Problem 77GP Problem 78GP: A 0.454-kg block is attached to a horizontal spring that is at its equilibrium length, and whose... Problem 79GP: BIO Escaping Octopus The giant Pacific octopus (Enteroctopus dofleini) has a typical mass of 15 kg... Problem 80GP Problem 81GP: The three air carts shown in Figure 9-44 have masses, reading from left to right, of m, 2m, and 4m,... Problem 82GP: Unlimited Overhang Four identical textbooks, each of length L, are stacked near the edge of a table,... Problem 83GP: Consider a one-dimensional. head-on elastic collision. One object has a mass m1 and an initial... Problem 84GP: Two air carts of mass m1 = 0.84 kg and m2 = 0.42 kg are placed on a frictionless track Cart 1 is at... Problem 85GP: Golden Earrings and the Golden Ratio A popular earring design features a circular piece of gold of... Problem 86GP: Amplified Rebound Height Two small rubber balls are dropped from rest at a height h above a hard... Problem 87GP: Predict/Calculate Weighing a Block on an Incline A wedge of mass m, is firmly attached to the top of... Problem 88GP: Predict/Calculate A uniform rope of length L and mass M rests on a table, (a) If you lift one end of... Problem 89PP Problem 90PP Problem 91PP Problem 92PP Problem 93PP: Referring to Example 9-12 Suppose a bullet of mass m = 6.75g is fired into a ballistic pendulum... Problem 94PP: Referring to Example 9-12 A bullet with a mass m = 8.10 g and an initial speed v1 = 320 m/s is fired... Problem 95PP: Referring to Example 9-19 Suppose that cart 1 has a mass of 3.00 kg and an initial speed of 0.250... Problem 96PP: Referring to Example 9-19 Suppose the two carts have equal masses and are both moving to the right... format_list_bulleted