College Physics 10th Edition
ISBN: 9781285737027
Author: Raymond A. Serway, Chris Vuille
Publisher: Raymond A. Serway, Chris Vuille
1 Introduction 2 Motion In One Dimension 3 Vectors And Two-Dimensional Motion 4 The Laws Of Motion 5 Energy 6 Momentum And Collisions 7 Rotational Motion And The Law Of Gravity 8 Rotational Equilibrium And Rotational Dynamics 9 Solids And Fluids 10 Thermal Physics 11 Energy In Thermal Processes 12 The Laws Of Thermodynamics 13 Vibrations And Waves 14 Sound 15 Electric Forces And Electric Fields 16 Electrical Energy And Capacitance 17 Current And Resistance 18 Direct-Current Circuits 19 Magnetism 20 Induced Voltages And Inductance 21 Alternating-Current Circuits And Electromagnetic Waves 22 Reflection And Refraction Of Light 23 Mirrors And Lenses 24 Wave Optics 25 Optical Instruments 26 Relativity 27 Quantum Physics 28 Atomic Physics 29 Nuclear Physics 30 Nuclear Energy And Elementary Particles Chapter4: The Laws Of Motion
4.1 Forces 4.2 Newton's First Law 4.3 Newton's Second Law 4.4 Newton's Third Law 4.5 Applications Of Newton's Laws 4.6 Forces Of Friction Chapter Questions Section: Chapter Questions
Problem 1WUE: Physics Review A hockey player strikes a puck, giving it an initial velocity of 10.0 m/s in the... Problem 2WUE: Four forces act on an object, given by A = 40.0 N east, B = 50.0 north, C = 70.0 N west, and D =... Problem 3WUE: A force of 30.0 N is applied in the positive x-direction to a block of mass 8.00 kg, at rest on a... Problem 4WUE: What would be the acceleration of gravity at the surface of a world with twice Earths mass and twice... Problem 5WUE: Two monkeys are holding onto a single vine of negligible mass that hangs vertically from a tree,... Problem 6WUE: Two identical strings making an angle of = 30.0 with respect to the vertical support a block of... Problem 7WUE: Calculate the normal force on a 15.0 kg block in the following circumstances: (a) The block is... Problem 8WUE: A horizontal force of 95.0 N is applied to a 60.0.kg crate on a rough, level surface. If the crate... Problem 9WUE Problem 10WUE: A block of mass 12.0 kg is sliding at an initial velocity of 8.00 m/s in the positive x-direction.... Problem 11WUE: A man exerts a horizontal force of 112 N on a refrigerator of mass 42.0 kg. If the refrigerator... Problem 12WUE: An Atwoods machine (Fig. 4.38) consists of two masses: one of mass 3.00 kg and the other of mass... Problem 13WUE: A block of mass m1= 10 kg is on a frictionless table to the left of a second block of mass m2 = 24... Problem 1CQ: A passenger sitting in the rear of a bus claims that she was injured as the driver slammed on the... Problem 2CQ: A space explorer is moving through space far from any planet or star. He notices a large rock, taken... Problem 3CQ: (a) If gold were sold by weight, would you rather buy it in Denver or in Death Valley? (b) If it... Problem 4CQ: If you push on a heavy box that is at rest, you must exert some force to start its motion. Once the... Problem 5CQ: A ball is held in a persons hand. (a) Identify all the external forces acting on the ball and the... Problem 6CQ: A weight lifter stands on a bathroom scale. (a) As she pumps a barbell up and down, what happens to... Problem 7CQ: (a) What force causes an automobile to move? (b) A propeller-driven airplane? (c) A rowboat? Problem 8CQ: If only one force acts on an object, can it be in equilibrium? Explain. Problem 9CQ: In the: motion picture It Happened One Night (Columbia Pictures, 1934), Clark Gable is standing... Problem 10CQ: Analyze the motion of a rock dropped in water in terms of its speed and acceleration as it falls.... Problem 11CQ: Identify the action-reaction pairs in the following situations: (a) a man takes a step, (b) a... Problem 12CQ: Draw a free-body diagram for each of the following objects: (a) a projectile in motion in the... Problem 13CQ: In a tug-of-war between two athletes, each pulls on the rope with a force of 200 N. What is the... Problem 14CQ: Suppose you are driving a car at a high speed. Why should you avoid slamming on your brakes when you... Problem 15CQ: As a block slides down a frictionless incline, which of the following statements is true? (a) Both... Problem 16CQ: A crate remains stationary after it has been placed on a ramp inclined at an angle with the... Problem 17CQ: In Figure 4.4, a locomotive has broken through the wall of a train station. During the collision,... Problem 18CQ: If an object is in equilibrium, which of the following statements is not true? (a) The speed of the... Problem 19CQ: A truck loaded with sand accelerates along a highway. The driving force on the truck remains... Problem 20CQ: A large crate of mass m is placed on the back of a truck but not tied down. As the truck accelerates... Problem 21CQ: Which of the following statements are true? (a) An astronauts weight is the same on the Moon as on... Problem 1P: The heaviest invertebrate is the giant squid, which is estimated to have a weight of about 2 tons... Problem 2P: A football punter accelerates a football from rest to a speed of 10 m/s during the time in which his... Problem 3P: A 6.0-kg object undergoes an acceleration of 2.0 m/s2. (a) What is the magnitude of the resultant... Problem 4P: One or more external forces are exerted on each object enclosed in a dashed box shown in Figure 4.2.... Problem 5P: A bag of sugar weighs 5.00 lb on Earth. What would it weigh in newtons on the Moon, where the... Problem 6P: A freight train has a mass of 1.5 107 kg. If the locomotive can exert a constant pull of 7.5 105... Problem 7P: A 75-kg man standing on a scale in an elevator notes that as the elevator rises, the scale reads 825... Problem 8P: Consider a solid metal sphere (S) a few centimeters in diameter and a feather (F). For each quantity... Problem 9P: As a fish jumps vertically out of the water, assume that only two significant forces act on it: an... Problem 10P: A 5.0-g bullet leaves the muzzle of a rifle with a speed of 320 m/s. What force (assumed constant)... Problem 11P: A boat moves through the water with two forces acting on it. One is a 2.00 103-N forward push by... Problem 12P: Two forces are applied to a car in an effort to move it, as shown in Figure P4.12. (a) What is the... Problem 13P: A 970.-kg car starts from rest on a horizontal roadway and accelerates eastward for 5.00 s when it... Problem 14P: An object of mass m is dropped from the roof of a building of height h. While the object is falling,... Problem 15P: After falling from rest from a height of 30.0 m, a 0.500-kg ball rebounds upward, reaching a height... Problem 16P: The force exerted by the wind on the sails of a sailboat is 390 N north. The water exerts a force of... Problem 17P: (a) Find the tension in each cable supporting the 6.00 102-N cat burglar in Figure P4.35. (b)... Problem 18P: A certain orthodontist uses a wire brace to align a patients crooked tooth as in Figure P4.88. The... Problem 19P: A 150-N bird feeder is supported by three cables as shown in Figure P4.39. Find the tension in each... Problem 20P: The leg and cast in Figure P4.40 weigh 220 N (w1). Determine the weight w2 and the angle needed so... Problem 21P: Two blocks each of mass m are fastened to the top of an elevator as in Figure P4.56. The elevator... Problem 22P: Two blocks each of mass m = 3.50 kg are fastened to the top of an elevator as in Figure P4.56. (a)... Problem 23P: The distance between two telephone poles is 50.0 m. When a 1.00-kg bird lands on the telephone wire... Problem 24P: The systems shown in Figure P4.58 are in equilibrium. If the spring scales are calibrated in... Problem 25P: A 5.0-kg bucket of water is raised from a well by a rope. If the upward acceleration of the bucket... Problem 26P: A crate of mass m = 32 kg rides on the bed of a truck attached by a cord to the back of the cab as... Problem 27P: Two blocks of masses m and 2m are held in equilibrium on a frictionless incline as in Figure P4.57.... Problem 28P: Two packing crates of masses 10.0 kg and 5.00 kg are connected by a light string that passes over a... Problem 29P: Assume the three blocks portrayed in Figure P4.59 move on a frictionless surface and a 42-N force... Problem 30P: A block of mass m = 5.8 kg is pulled up a = 25 incline as in Figure P4.24 with a force of magnitude... Problem 31P: A setup similar to the one shown in Figure P4.53 is often used in hospitals to support and apply a... Problem 32P: Two blocks of masses m1 and m2 (m1 m2) are placed on a frictionless table in contact with each... Problem 33P: A 276-kg glider is being pulled by a 1 950-kg jet along a horizontal runway with an acceleration of... Problem 34P: In Figure P4.63, the light, taut, unstretchable cord B joins block 1 and the larger-mass block 2.... Problem 35P: (a) An elevator of mass m moving upward has two forces acting on it: the upward force of tension in... Problem 36P: An object with mass m1 = 5.00 kg rests on a frictionless horizontal table and is connected to a... Problem 37P: A 1.00 103 car is pulling a 300.-kg trailer. Together, the car and trailer have an acceleration of... Problem 38P: Two objects with masses of 3.00 kg and 5.00 kg are connected by a light string that passes over a... Problem 39P: A dockworker loading crates on a ship finds that a 20.0-kg crate, initially at rest on a horizontal... Problem 40P: In Figure P4.64, m1 = 10. kg and m2 = 4.0 kg. The coefficient of static friction between m1 and the... Problem 41P: A 1.00 103-N crate is being pushed across a level floor at a constant speed by a force F of 3.00 ... Problem 42P: A block of mass 3m is placed on a frictionless horizontal surface, and a second block of mass m is... Problem 43P: Consider a large truck carrying a heavy load, such as steel beams. A significant hazard for the... Problem 44P: A crate of mass 45.0 kg is being transported on the flatbed of a pickup truck. The coefficient of... Problem 45P: Objects with masses m1 = 10.0 kg and m2 = 5.00 kg are connected by a light string that passes over a... Problem 46P: A hockey puck struck by a hockey stick is given an initial speed v0 in the positive x-direction. The... Problem 47P: The coefficient of static friction between the 3.00-kg crate and the 35.0 incline of Figure P4.31 is... Problem 48P: A student decides to move a box of books into her dormitory room by pulling on a rope attached to... Problem 49P: An object falling under the pull of gravity is acted upon by a frictional force of air resistance.... Problem 50P: A car is traveling at 50.0 km/h on a flat highway. (a) If the coefficient of friction between road... Problem 51P: A 3.00-kg block starts from rest at the top of a 30.0 incline and slides 2.00 m down the incline in... Problem 52P: A 15.0-lb block rests on a horizontal floor, (a) What force does the floor exert on the block? (b) A... Problem 53P: To meet a U.S. Postal Service requirement, employees footwear must have a coefficient of static... Problem 54P: Objects of masses m1 = 4.00 kg and m2 = 9.00 kg are connected by a light string dial passes over a... Problem 55P: The person in Figure P4.49 weighs 170. lb. Each crutch makes an angle of 22.0 with the vertical (as... Problem 56AP: As a protest against the umpires calls, a baseball pitcher throws a ball straight up into the air at... Problem 57AP: Three objects are connected on a table as shown in Figure P4.73. The coefficient of kinetic friction... Problem 58AP: The force exerted by the wind on a sailboat is approximately perpendicular 10 the sail and... Problem 59AP: (a) What is the resultant force exerted by the two cables supporting the traffic light in Figure... Problem 60AP: (a) What is the minimum force of friction required to hold the system of Figure P4.74 in... Problem 61AP: A boy coasts down a hill on a sled, reaching a level surface at the bottom with a speed of 7.00 m/s.... Problem 62AP: A woman at an airport is towing her 20.0-kg suitcase at constant speed by pulling on a strap at an... Problem 63AP: A box rests on the back of a truck. The coefficient of static friction between the box and the bed... Problem 64AP: Three objects are connected by light strings as shown in Figure P4.78. The string connecting the... Problem 65AP: A frictionless plane is 10.0 m long and inclined at 35.0. A sled starts at the bottom with an... Problem 66AP: A high diver of mass 70.0 kg steps off a board 10.0 m above the water and falls vertical to the... Problem 67AP: A 2.00-kg aluminum block and a 6.00-kg copper block are connected by a light string over a... Problem 68AP: An object of mass m1 hangs from a string that passes over a very light fixed pulley P1 as shown in... Problem 69AP: Two boxes of fruit on a frictionless horizontal surface are connected by a light string as in Figure... Problem 70AP: Measuring coefficients of friction A coin is placed near one edge of a book lying on a table, and... Problem 71AP: A fisherman poles a boat as he searches for his next catch. He pushes parallel to the length of the... Problem 72AP: A rope with mass m, is attached to a block with mass mb, as in Figure P4.72. Both the rope and the... Problem 73AP: A car accelerates down a hill (Fig. P4.87), going from rest to 30.0 m/s in 6.00 s. During the... Problem 74AP Problem 75AP: The parachute on a race car of weight 8 820 N opens at the end of a quarter-mile run when the car is... Problem 76AP: On an airplanes takeoff, the combined action of the air around the engines and wings of an airplane... Problem 77AP: The board sandwiched between two other boards in Figure P4.91 weighs 95.5 N. If the coefficient of... Problem 78AP: A sled weighing 60.0 N is pulled horizontally across snow so that the coefficient of kinetic... Problem 79AP: A 72-kg man stands on a spring scale in an elevator. Starting from rest, the elevator ascends,... Problem 80AP: A magician pulls a tablecloth from under a 200-g mug located 30.0 cm from the edge of the cloth. The... Problem 81AP: An inventive child wants to reach an apple in a tree without climbing the tree. Sitting in a chair... Problem 82AP: A fire helicopter carries a 620-kg bucket of water at the end of a 20.0-m-long cable. Flying back... Problem 83AP: A crate of weight Fg is pushed by a force P on a horizontal floor as shown in Figure P4.83. The... Problem 84AP: In Figure P1.84, the pulleys and the cord are light, all surfaces are frictionless, and the cord... Problem 85AP: What horizontal force must ho applied to a large block of mass M shown in Figure P4.85 so that the... Problem 3P: A 6.0-kg object undergoes an acceleration of 2.0 m/s2. (a) What is the magnitude of the resultant...
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Two forces, F 1=20 N and F 2=10 N , are acting on a block of mass 5kg sitting on a horizontal surface with coefficient of kinetic friction k = 0.17 . The block moved to + x-axes, what is themagnitude of:
a) the normal force?
b) the friction force ?
c) the net force on the block?
d) the resulting acceleration of the block?
Definition Definition Force that opposes motion when the surface of one item rubs against the surface of another. The unit of force of friction is same as the unit of force.
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