1 Units, Physical Quantities, And Vectors 2 Motion Along A Straight Line 3 Motion In Two Or Three Dimensions 4 Newton’s Laws Of Motion 5 Applying Newton’s Laws 6 Work And Kinetic Energy 7 Potential Energy And Energy Conservation 8 Momentum, Impulse, And Collisions 9 Rotation Of Rigid Bodies 10 Dynamics Of Rotational Motion 11 Equilibrium And Elasticity 12 Fluid Mechanics 13 Gravitation 14 Periodic Motion 15 Mechanical Waves 16 Sound And Hearing 17 Temperature And Heat 18 Thermal Properties Of Matter 19 The First Law Of Thermodynamics 20 The Second Law Of Thermodynamics 21 Electric Charge And Electric Field 22 Gauss’s Law 23 Electric Potential 24 Capacitance And Dielectrics 25 Current, Resistance, And Electromotive Force 26 Direct-current Circuits 27 Magnetic Field And Magnetic Forces 28 Sources Of Magnetic Field 29 Electromagnetic Induction 30 Inductance 31 Alternating Current 32 Electromagnetic Waves 33 The Nature And Propagation Of Light 34 Geometric Optics 35 Interference 36 Diffraction 37 Relativity 38 Photons: Light Waves Behaving As Particles 39 Particles Behaving As Waves 40 Quantum Mechanics I: Wave Functions 41 Quantum Mechanics Ii: Atomic Structure 42 Molecules And Condensed Matter 43 Nuclear Physics 44 Particle Physics And Cosmology expand_more
4.1 Force And Interactions 4.2 Newton’s First Law 4.3 Newton’s Second Law 4.4 Mass And Weight 4.5 Newton’s Third Law 4.6 Free-body Diagrams Chapter Questions expand_more
Problem 4.1DQ: Can a body be in equilibrium when only one force acts on it? Explain. Problem 4.2DQ: A ball thrown straight up has zero velocity at its highest point. Is the ball in equilibrium at this... Problem 4.3DQ: A helium balloon hovers in midair, neither ascending descending. Is it in equilibrium? What forces... Problem 4.4DQ: When you fly in an airplane at night in smooth air, you have no sensation of motion, even though the... Problem 4.5DQ: If the two ends of a rope in equilibrium are pulled with forces of equal magnitude and opposite... Problem 4.6DQ: You tie a brick lo the end of a rope and whirl the brick around you in a horizontal circle. Describe... Problem 4.7DQ: When a car stops suddenly, the passengers tend to move forward relative to their seats. Why? When a... Problem 4.8DQ: Some people say that the force of inertia (or force of momentum) throws the passengers forward when... Problem 4.9DQ: A passenger in a moving bus with no windows notices that a ball that has been at rest in the aisle... Problem 4.10DQ: Suppose you chose the fundamental physical quantities to be force, length, and time instead of mass,... Problem 4.11DQ: Why is the earth only approximately an inertial reference frame? Problem 4.12DQ: Does Newtons second law hold true for an observer in Ivan as it speeds up, slows down, or rounds a... Problem 4.13DQ: Some students refer to the quantity ma as the force of acceleration. Is it correct to refer to this... Problem 4.14DQ: The acceleration of a falling body is measured in an elevator that is traveling upward at a constant... Problem 4.15DQ: You can play catch with a softball in a bus moving with constant speed on a straight road, just as... Problem 4.16DQ: Students sometimes say that the force of gravity on an object is 9.8 m/s2. What is wrong with this... Problem 4.17DQ: Why can it hurt your foot more to kick a big rock than a small pebble? Must the big rock hurt more?... Problem 4.18DQ: Its not the fall that hurts you; its the sudden stop at the bottom. Translate this saying into the... Problem 4.19DQ: A person can dive into water from a height of 10 m without injury, but a person who jumps off the... Problem 4.20DQ: Why are cars designed to crumple in front and back for safety? Why not for side collisions and... Problem 4.21DQ: When a string barely strong enough lifts a heavy weight, it can lift the weight by a steady pull;... Problem 4.22DQ: A large crate is suspended from the end of a vertical rope. Is the tension in the rope greater when... Problem 4.23DQ: Which feels a greater pull due to the earths gravity; a 10-kg stone or a 20-kg stone? If you drop... Problem 4.24DQ: Why is it incorrect to say that 1.0 kg equals 2.2 lb? Problem 4.25DQ: A horse is hitched to a wagon. Since the wagon pulls back on the horse just as hard as the horse... Problem 4.26DQ: True or false? You exert a push P on an object and it pushes back on you with a force F. If the... Problem 4.27DQ: A large truck and a small compact car have a head-on collision. During the collision, the truck... Problem 4.28DQ: When a car comes to a stop on a level highway, what force causes it to slow down? When the car... Problem 4.29DQ: A small compact car is pushing a large van that has broken down, and they travel along the road with... Problem 4.30DQ: Consider a tug-of-war between two people who pull in opposite directions on the ends of a rope. By... Problem 4.31DQ: Boxes A and B are in contact on a horizontal, frictionless surface. You push on box A with a... Problem 4.32DQ: A manual for student pilots contains this passage: When an airplane flies at a steady altitude,... Problem 4.33DQ: If your hands are wet and no towel is handy, you can remove some of the excess water by shaking... Problem 4.34DQ: If you squat down (such as when you examine the books on a bottom shelf) and then suddenly get up,... Problem 4.35DQ: When a car is hit from behind, the occupants may experience whiplash. Use Newtons laws of motion to... Problem 4.36DQ: In a head-on auto collision, passengers who are not wearing seat belts may be thrown through the... Problem 4.37DQ: In a head-on collision between a compact 1000-kg car and a large 2500-kg car, which one experiences... Problem 4.38DQ: Suppose you are in a rocket with no windows, traveling in deep space far from other objects. Without... Problem 4.1E: Two dogs pull horizontally on ropes attached to a post; the angle between the ropes is 60.0. If... Problem 4.2E: To extricate an SUV stuck in the mud, workmen use three horizontal ropes, producing the force... Problem 4.3E: BIO Jaw Injury. Due to a jaw injury, a patient must wear a strap (Fig. E4.3) that produces a net... Problem 4.4E: A man is dragging a trunk up the loading ramp of a movers truck. The ramp has a slope angle of 20.0,... Problem 4.5E: Forces F1 and F2act at a point. The magnitude of F1 is 9.00 N, and its direction is 60.0 above the... Problem 4.6E: An electron (mass = 9.11 1031 kg) leaves one end of a TV picture tube with zero initial speed and... Problem 4.7E: A 68.5-kg skater moving initially at 2.40 m/s on rough horizontal ice comes to rest uniformly in... Problem 4.8E: You walk into an elevator, step onto a scale, and push the up button. You recall that your normal... Problem 4.9E: A box rests on a frozen pond, which serves as a frictionless horizontal surface. If a fisherman... Problem 4.10E: A dockworker applies a constant horizontal force of 80.0 N to a block of ice on a smooth horizontal... Problem 4.11E: A hockey puck with mass 0.160 kg is at rest at the origin (x = 0) on the horizontal, frictionless... Problem 4.12E: A crate with mass 32.5 kg initially at rest on a warehouse floor is acted on by a net horizontal... Problem 4.13E: A 4.50-kg experimental cart undergoes an acceleration in a straight line (the x-axis). The graph in... Problem 4.14E: A 2.75-kg cat moves in a straight line (the x-axis). Figure E4.14 shows a graph of the x-component... Problem 4.15E: A small 8.00-kg rocket burns fuel that exerts a time varying upward force on the rocket (assume... Problem 4.16E: An astronauts pack weighs 17.5 N when she is on the earth but only 3.24 N when she is at the surface... Problem 4.17E: Superman throws a 2400-N boulder at an adversary. What horizontal force must Superman apply to the... Problem 4.18E: BIO (a) An ordinary flea has a mass of 210 g. How many newtons does it weigh? (b) The mass of a... Problem 4.19E: At the surface of Jupiters moon Io, the acceleration due to gravity is g = 1.81 m/s2. A watermelon... Problem 4.20E: A small car of mass 380 kg is pushing a large truck of mass 900 kg due east on a level road. The car... Problem 4.21E: BIO World-class sprinters can accelerate out of the starting blocks with an acceleration that is... Problem 4.22E: The upward normal force exerted by the floor is 620 N on an elevator passenger who weighs 650 N.... Problem 4.23E: Boxes A and B are in contact on a horizontal, frictionless surface (Fig. E4.23). Box A has mass 20.0... Problem 4.24E: A student of mass 45 kg jumps off a high diving board. What is the acceleration of the earth toward... Problem 4.25E: Section 4.6 Free-Body Diagrams 4.25Crates A and B sit at rest side by side on a frictionless... Problem 4.26E: You pull horizontally on block B in Fig. F4.26, causing both blocks to move together as a unit. For... Problem 4.27E: A ball is hanging from a long siring that is tied to the ceiling of a train car traveling eastward... Problem 4.28E: CP A .22-caliber rifle bullet traveling at 350 m/s strikes a large tree and penetrates it to a depth... Problem 4.29E: A chair of mass 12.0 kg is sitting on the horizontal floor: the floor is not frictionless. You push... Problem 4.30P: A large box containing your new computer sits on the bed of your pickup truck. You are stopped at a... Problem 4.31P: CP A 5.60-kg bucket of water is accelerated upward by a cord of negligible mass whose breaking... Problem 4.32P: CP You have just landed on Planet X. You release a 100-g ball from rest from a height of 10.0 m and... Problem 4.33P: Two adults and a child want to push a wheeled cart in the direction marked x in Fig. P4.33. The two... Problem 4.34P: CP An oil tankers engines have broken down, and the wind is blowing the tanker straight toward a... Problem 4.35P: CP BIO A Standing Vertical Jump. Basketball player Darrell Griffith is on record as attaining a... Problem 4.36P: CP An advertisement claims that a particular automobile can stop on a dime. What net force would be... Problem 4.37P: BIO Human Biomechanics. The fastest pitched baseball was measured at 46 m/s. A typical baseball has... Problem 4.38P: BIO Human Biomechanics. The fastest served tennis ball, served by Big Bill Tilden in 1931, was... Problem 4.39P: Two crates, one with mass 4.00 kg and the other with mass 6.00 kg, sit on the frictionless surface... Problem 4.40P: CP Two blocks connected by a light horizontal rope sit at rest on a horizontal, frictionless... Problem 4.41P: CALC To study damage to aircraft that collide with large birds, you design a test gun that will... Problem 4.42P: CP A 6.50-kg instrument is hanging by a vertical wire inside a spaceship that is blasting off from... Problem 4.43P: BIO Insect Dynamics. The froghopper (Philaenus spumarius), the champion leaper of the insect world,... Problem 4.44P: A loaded elevator with very worn cables has a total mass of 2200 kg, and the cables can withstand a... Problem 4.45P: CP After an annual checkup, you leave your physicians office, where you weighed 683 N. You then get... Problem 4.46P: CP A nail in a pine board stops a 4.9-N hammer head from an initial downward velocity of 3.2 m/s in... Problem 4.47P: CP Jumping to the Ground. A 75.0-kg man steps off a platform 3.10 m above the ground. He keeps his... Problem 4.48P: The two blocks in Fig. P4.48 are connected by a heavy uniform rope with a mass of 4.00 kg. An upward... Problem 4.49P: CP Boxes A and B are connected to each end of a light vertical rope (Fig. P4.49). A constant upward... Problem 4.50P: CP Extraterrestrial Physics. You have landed on an unknown planet, Newtonia, and want to know what... Problem 4.51P: CP CALC A mysterious rocket-propelled object of mass 45.0 kg is initially at rest in the middle of... Problem 4.52P: CALC The position of a training helicopter (weight 2.75 105N) in a test is given by r = (0.020... Problem 4.53P: DATA The table gives automobile performance data for a few types of cars: Make and Model (Year) Mass... Problem 4.54P: DATA An 8.00-kg box sits on a level floor. You give the box a sharp push and find that it travels... Problem 4.55P: DATA You are a Starfleet captain going boldly where no man has gone before. You land on a distant... Problem 4.56CP Problem 4.57PP: BIO FORCES ON A DANCER'S BODY. Dancers experience large forces associated with the jumps they make.... Problem 4.58PP: BIO FORCES ON A DANCERS BODY. Dancers experience large forces associated with the jumps they make.... Problem 4.59PP: BIO FORCES ON A DANCER'S BODY. Dancers experience large forces associated with the jumps they make.... Problem 4.60PP: The forces on a dancer can be measured directly when a dancer performs a jump on a force plate that... format_list_bulleted