1 Doing Physics 2 Motion In A Straight Line 3 Motion In Two And Three Dimensions 4 Force And Motion 5 Using Newton's Laws 6 Energy, Work, And Power 7 Conservation Of Energy 8 Gravity 9 Systems Of Particles 10 Rotational Motion 11 Rotational Vectors And Angular Momentum 12 Static Equilibrium 13 Oscillatory Motion 14 Wave Motion 15 Fluid Motion 16 Temperature And Heat 17 The Thermal Behavior Of Matter 18 Heat, Work, And The First Law Of Thermodynamics 19 The Second Law Of Thermodynamics 20 Electric Charge, Force, And Field 21 Gauss's Law 22 Electric Potential 23 Electrostatic Energy And Capacitors 24 Electric Current 25 Electric Circuits 26 Magnetism: Force And Field 27 Electromagnetic Induction 28 Alternating-current Circuits 29 Maxwell's Equations And Electromagnetic Waves 30 Reflection And Refraction 31 Images And Optical Instruments 32 Interference And Diffraction 33 Relativity 34 Particles And Waves 35 Quantum Mechanics 36 Atomic Physics 37 Molecules And Solids 38 Nuclear Physics 39 From Quarks To The Cosmos expand_more
4.1 The Wrong Question 4.2 Newton's First And Second Laws 4.3 Forces 4.4 The Force Of Gravity 4.5 Using Newton's Second Law 4.6 Newton's Third Law Chapter Questions expand_more
Problem 1FTD: Distinguish the Aristotelian and Galilean/New Ionian views of the natural stale of motion. Problem 2FTD: A ball bounces off a wall with the same speed it had before it hit the wall. Has its momentum... Problem 3FTD: We often use the term inertia to describe human sluggishness. How is this usage related to the... Problem 4FTD: Does a body necessarily move in the direction of the net force acting on it? Problem 5FTD: A truck crashes into a stalled car. A student trying to explain the physics of this event claims... Problem 6FTD: A barefoot astronaut kicks a ball, hard, across a space station. Does the balls apparent... Problem 7FTD: The surface gravity on Jupiters moon Io is one-fifth that on Earth. What would happen to your weight... Problem 8FTD: In paddling a canoe, you push water backward with your paddle. What force actually propels the canoe... Problem 9FTD: Is it possible for a nonzero net force to act on an object without the objects speed changing?... Problem 10FTD: As your plane accelerates down the runway, you take your keys from your pocket and suspend them by a... Problem 11FTD: A driver tells passengers to buckle their seatbelts, invoking the law of inertia. Whats that got to... Problem 12FTD: If you cut a spring in half, is the spring constant of each new spring less than, equal to, or... Problem 13FTD: As youre sitting on a chair, theres a gravitational force down-ward on you, and an upward normal... Problem 14E: Section 4.2 Newtons First and Second Laws A subway trains mass is 1.5106 kg. What force is required... Problem 15E: A 61-Mg railroad locomotive can exert a 0.12-MN force. At what rate can it accelerate (a) by itself... Problem 16E: A small plane accelerates down the runway at 7.2 m/s2. If its propeller provides an 11-kN force,... Problem 17E: A car leaves the road traveling at 110 km/h and hits a tree, coming to a stop in 0.14 s. What... Problem 18E: By how much does the force required to stop a car increase if the initial speed is doubled while the... Problem 19E: Kinesin is a motor protein responsible for moving materials within living cells. If it exerts a... Problem 20E: Starting from rest and undergoing constant acceleration, a 940-kg racing car covers 400 m in 4.95 s.... Problem 21E: In an egg-dropping contest, a student encases an 85-g egg in a large Styrofoam block. If the force... Problem 22E: In a front-end collision, a 1300-kg car with shock-absorbing bumpers can withstand a maximum force... Problem 23E: Show that the units of acceleration can be written as N/kg. Why does it make sense to give g as 9.8... Problem 24E: Your spaceship crashes on one of the Suns planets. Fortunately, the ships scales are intact and show... Problem 25E: Your friend can barely lift a 35-kg concrete block on Earth. How massive a block could she lift on... Problem 26E: A cereal box says net weight 340 grams. Whats the actual weight (a) in SI units and (b) in ounces? Problem 27E: Youre a safely engineer for a bridge spanning the U.S.-Canadian border. U.S. specifications permit a... Problem 28E: The gravitational acceleration at the International Space Stations altitude is about 89% of its... Problem 29E: A 50-kg parachutist descends at a steady 40 km/h. What force does air exert on the parachute? Problem 30E: A 930-kg motorboat accelerates away from a dock at 2.3 m/s2. Its propeller provides a 3.9-kN thrust... Problem 31E: An elevator accelerates downward at 2.4 m/s2. What force does the elevators floor exert on a 52-kg... Problem 32E: At 560 metric tons, the Airbus A-380 is the worlds largest air-liner. Whats the upward force on an... Problem 33E: Youre an engineer working on Ares I, NASAs replacement for the space shuttles. Performance specs... Problem 34E: You slop into an elevator, and it accelerates to a downward speed of 9.2 m/s in 2.1 s.... Problem 35E: What upward gravitational force does a 5600-kg elephant exert on Earth? Problem 36E: Your friends mass is 65 kg. If she jumps off a 120-cm-high table, now far does Earth move toward her... Problem 37E: What force is necessary to stretch a spring 48 cm, if its spring constant is 270 N/m? Problem 38E: A 35-N force is applied to a spring with spring constant k = 220 N/m. How much does the spring... Problem 39E: A spring with spring constant k = 340 N/m is used to weigh a 6.7-kg fish. How far does the spring... Problem 40P: A 1.25-kg object is moving in the x-direction at 17.4 m/s. Just 3.41 s later, its moving at 26.8 m/s... Problem 41P: An airplane encounters sudden turbulence, and you feel momentarily lighter. If your apparent weight... Problem 42P: A 74-kg tree surgeon rides a cherry picker lift to reach the upper branches of a tree. What force... Problem 43P: A dancer executes a vertical jump during which the floor pushes up on his feet with a force 50%... Problem 44P: Find expressions for the force needed to bring an object of mass m from rest to speed v (a) in lime... Problem 45P: An elevator moves upward at 5.2 m/s. Whats its minimum stopping time if the passengers are to remain... Problem 46P: A 2.50-kg object is moving along the x-axis at 1.60 m/s. As it passes the origin, two forces F1 and... Problem 47P: Blocks of 1.0, 2.0, and 3.0 kg are lined up on a frictionless table, as shown in Fig. 4.22, with a... Problem 48P: A child pulls an 11-kg wagon with a horizontal handle whose mass is 1.8 kg, accelerating the wagon... Problem 49P: Biophysicists use an arrangement of laser beams called optical tweezers to manipulate microscopic... Problem 50P: A force F is applied to a spring of spring constant k0, stretching it a distance x. Consider the... Problem 51P: A 22(M)-kg airplane pulls two gliders, the first of mass 310 kg and the second of mass 260 kg, down... Problem 52P: A biologist is studying the growth of rats on the Space Station. To determine a rats mass, she puts... Problem 53P: An elastic towrope has spring constant 1300 N/m. Its connected between a truck and a 1900-kg car. As... Problem 54P: A 2.0-kg mass and a 3.0-kg mass are on a horizontal friction-less surface, connected by a massless... Problem 55P: Youre an automotive engineer designing the crumple zone of a new carthe region that compresses as... Problem 56P: Frogs tongues dart out to catch insects, with maximum tongue accelerations of about 250 m/s2. What... Problem 57P: Two large crates, with masses 640 kg and 490 kg, are connected by a stiff, massless spring (k = 8.1... Problem 58P: What force do the blades of a 4300-kg helicopter exert on the air when the helicopter is (a)... Problem 59P: What engine thrust (force) is needed to accelerate a rocket of mass m (a) downward at 1.40g near... Problem 60P: Your engineering firm is asked to specify the maximum load for the elevators in a new building. Each... Problem 61P: With its fuel tanks half full, an F-35A jet fighter has mass 18 Mg and engine thrust 191 kN. An... Problem 62P: Two springs have the same unstretched length but different spring constants, k1 and k2. (a) If... Problem 63P: Although we usually write Newtons second law for one-dimensional motion in the form F = ma, which... Problem 64P: A railroad car is being pulled beneath a grain elevator that dumps grain at the rate of 450 kg/s.... Problem 65P: A block 20% more massive than you hangs from a rope that goes over a frictionless, massless pulley.... Problem 66P: Youre asked to calibrate a device used to measure vertical acceleration in helicopters. The device... Problem 67P: A spider of mass ms drapes a silk thread of negligible mass over a stick with its far end a distance... Problem 68P: Figure 4.27 shows vertical accelerometer data from an iPhone that was dropped onto a pillow. The... Problem 69P: A hockey stick is in contact with a 165-g puck for 22.4 ms; during this time, the force on the puck... Problem 70P: After parachuting through the Martian atmosphere, the Mars Science Laboratory executed a complex... Problem 71P: Your airplane is caught in a brief, violent downdraft. To your amazement, pretzels rise vertically... Problem 72P: Youre assessing the Engineered Material Arresting System (EMAS) at New Yorks JFK airport. The system... Problem 73P: Two masses are joined by a massless string. A 30-N force applied vertically to the upper mass gives... Problem 74P: A mass M hangs from a uniform rope of length L and mass m. Find an expression for the rope tension... Problem 75P: Jerk is the rate of change of acceleration, and its what can make you sick on an amusement park... Problem 76PP: Laptop computers are equipped with accelerometers that sense when the device is dropped and then put... Problem 77PP: Laptop computers are equipped with accelerometers that sense when the device is dropped and then put... Problem 78PP: Laptop computers are equipped with accelerometers that sense when the device is dropped and then put... Problem 79PP: Laptop computers are equipped with accelerometers that sense when the device is dropped and then put... format_list_bulleted