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 Chapter5: Energy
5.1 Work 5.2 Kinetic Energy And T He Work- Energy Theorem 5.3 Gravitational Potential Energy 5.4 Gravity And Nonconservative Forces 5.5 Spring Potential Energy 5.6 Systems And Energy Conservation 5.7 Power 5.8 Work Done By A Varying Force Chapter Questions Section: Chapter Questions
Problem 1WUE: Physics Review A crane lifts a loud of bricks of mass 1 570 kg at an initial acceleration of 1.60... Problem 2WUE: Physics Review A crate of mass 20.0 kg rest on a level surface. If the coefficient of kinetic... Problem 3WUE: Calculate the work done by an applied force of 75.0 N on a crate if (a) the force is exerted... Problem 4WUE Problem 5WUE Problem 6WUE: A 4.00-kg crate Marling at rest slides dawn a rough 6.00-m-long ramp, inclined at 30.0 below the... Problem 7WUE: A skier leaves a ski jump at 15.0 m/s at some angle . At what speed is he traveling at his maximum... Problem 8WUE: A block of mass 3.00 kg is placed against a horizontal spring of constant k = 875 N/m and pushed so... Problem 9WUE: What average mechanical power must a 70.0-kg mountain climber generate to climb to the summit of a... Problem 10WUE: A puck of mass 0.170 kg slides across ice in the positive x-direction with a kinetic friction... Problem 1CQ: Consider a tug-of-war as in Figure CQ5.1, in which two teams pulling on a rope are evenly matched so... Problem 2CQ: During a stress test of the cardiovascular system, a patient walks and runs on a treadmill, (a) Is... Problem 3CQ: (a) If the height of a playground slide is kept constant, will the length of the slide or whether it... Problem 4CQ: (a) Can the kinetic energy of a system be negative? (b) Can the gravitational potential energy of a... Problem 5CQ: Roads going up mountains are formed into switch-backs, with the road weaving back and forth along... Problem 6CQ: A bowling ball is suspended from the ceiling of a lecture hall by a strong cord. The ball is drawn... Problem 7CQ: As a simple pendulum swings back and forth, the forces acting on the suspended object are the force... Problem 8CQ: Discuss whether any work is being done by each of the following agents and, if so, whether the work... Problem 9CQ: When a punter kicks a football, is he doing any work on the ball while the toe of his foot is in... Problem 10CQ: The driver of a car slams on her brakes to avoid colliding with a deer crossing the highway. What... Problem 11CQ: A weight is connected to a spring that is suspended vertically from the ceiling. If the weight is... Problem 12CQ: In most situations we have encountered in this chapter, frictional forces tend to reduce the kinetic... Problem 13CQ: Suppose you are reshelving books in a library. As you lift a book from the floor and place it on the... Problem 14CQ: The feet of a standing person of mass m exert a force equal to mg on the floor, and the floor exerts... Problem 15CQ: An Earth satellite is in a circular orbit at an altitude of 500 km. Explain why the work done by the... Problem 16CQ: Mark and David are loading identical cement blocks onto Davids pickup truck. Mark lifts his block... Problem 17CQ: If the speed of a particle is doubled, what happens to its kinetic energy? (a) It becomes four times... Problem 18CQ: A certain truck has twice the mass of a car. Both are moving at the same speed. If the kinetic... Problem 19CQ: If the net work done on a particle is zero, which of the following statements must be true? (a) The... Problem 20CQ: A car accelerates uniformly from rest. Ignoring air friction, when does the car require the greatest... Problem 1P: A weight lifter lifts a 350-N set of weights from ground level to a position over his head, a... Problem 2P: In 1990 Walter Arfeuille of Belgium lifted a 281.5-kg object through a distance of 17.1 cm using... Problem 3P Problem 4P: a shopper in a supermarket pushes a cart with a force of 35 N directed at an angle of 25 below the... Problem 5P: Starting from rest, a 5.00-kg block slides 2.50 m down a rough 30.0 incline. The coefficient of... Problem 6P: A horizontal force of 150 N is used to push a 40.0-kg packing crate a distance of 6.00 m on a rough... Problem 7P: A sledge loaded with bricks has a total mass of 18.0 kg and it pulled at constant speed by a rope... Problem 8P: A block of mass m = 2.50 kg is pushed a distance d = 2.20 m along a frictionless horizontal table by... Problem 9P: A mechanic pushes a 2.50 103-kg car from rest to a speed of v, doing 5.00 103 J of work in the... Problem 10P: A 7.00-kg bowling ball moves at 3.00 m/s. How fast must a 2.45-g Ping-Pong ball move so that the two... Problem 11P: A 65.0-kg runner has a speed of 5.20 m/s at one instant during a long-distance event. (a) What is... Problem 12P: A worker pushing a 35.0-kg wooden crate at a constant speed for 12.0 m along a wood floor does 350 J... Problem 13P: A 70-kg base runner begins his slide into second base when he is moving at a speed of 4.0 m/s. The... Problem 14P: A running 62-kg cheetah has a top speed of 32 m/s. (a) What is the cheetahs maximum kinetic energy?... Problem 15P: A 7.80-g bullet moving at 575 m/s penetrates a tree trunk to a depth of 5.50 cm. (a) Use work and... Problem 16P: A 0.60-kg particle has a speed of 2.0 m/s at point A and a kinetic energy of 7.5 J at point B. What... Problem 17P: A large cruise ship of mass 6.50 107 kg has a speed of 12.0 m/s at some instant. (a) What is the... Problem 18P: A man pushing a crate of mass m = 92.0 kg at a speed of v = 0.850 m/s encounters a rough horizontal... Problem 19P: A 0.20-kg stone is held 1.3 m above the top edge of a water well and then dropped into it. The well... Problem 20P: When a 2.50-kg object is hung vertically on a certain light spring described by Hookes law, the... Problem 21P: In a control system, an accelerometer consists of a 4.70-g object sliding on a calibrated horizontal... Problem 22P: A 60.0-kg athlete leaps straight up into the air from a trampoline with an initial speed of 9.0 m/s.... Problem 23P: A 2.10 103-kg pile driver is used to drive a steel I-beam into the ground. The pile driver falls... Problem 24P: Two blocks are connected by a light string that passes over two frictionless pulleys as in Figure... Problem 25P: A daredevil on a motorcycle leaves the end of a ramp with a speed of 35.0 m/s as in Figure P5.25. If... Problem 26P: Truck suspensions often have helper springs dial engage at high loads. One such arrangement is a... Problem 27P: The chin-up is one exercise that can be used to strengthen the biceps muscle. This muscle can exert... Problem 28P: A flea is able to jump about 0.5 m. It has been said that if a flea were as big as a human, it would... Problem 29P: A 50.0-kg projectile is fired at an angle of 30.0 above the horizontal with an initial speed of 1.20... Problem 30P: A projectile of mass m is fired horizontally with an initial speed of v0 from a height of h above a... Problem 31P: A horizontal spring attached to a wall has a force constant of 850 N/m. A block of mass 1.00 kg is... Problem 32P: A 50.-kg pole vaulter running at 10. m/s vaults over the bar. Her speed when she is above the bar is... Problem 33P: A child and a sled with a combined mass of 50.0 kg slide down a frictionless slope. If the sled... Problem 34P: Hookes law describes a certain light spring of unstretched length 35.0 cm. When one end is attached... Problem 35P: A 0.250-kg block along a horizontal track has a speed of 1.50 m/s immediately before colliding with... Problem 36P: A block of mass m = 5.00 kg is released from rest from point and slides on the frictionless track... Problem 37P: Tarzan savings on a 30.0-m-long vine initially inclined at an angle of 37.0 with the vertical. What... Problem 38P: Two blocks are connected by a light string that passes over a frictionless pulley as in Figure... Problem 39P: The launching mechanism of a toy gun consists of a spring of unknown spring constant, as shown in... Problem 40P: (a) A block with a mass m is pulled along a horizontal surface for a distance x by a constant force... Problem 41P: (a) A child slides down a water slide at an amusement park from an initial height h. The slide can... Problem 42P: An airplane of mass 1.50 104 kg is moving at 60.0 m/s. The pilot then increases the engines thrust... Problem 43P: The system shown in Figure P5.43 is used to lift an object of mass m = 76.0 kg. A constant downward... Problem 44P: A 25.0-kg child on a 2.00-m-long swing is released from rest when the ropes of the swing make an... Problem 45P: A 2.1 103-kg car starts from rest at the top of a 5.0-m-long driveway that is inclined at 20.0 with... Problem 46P: A child of mass m starts from rest and slides without friction from a height h along a curved... Problem 47P: A skier starts from rest at the top of a hill that is inclined 10.5 with respect to the horizontal.... Problem 48P: In a circus performance, a monkey is strapped to a sled and both are given an initial speed of 4.0... Problem 49P: An 80.0-kg skydiver jumps out of a balloon at an altitude of 1.00 103 m and opens the parachute at... Problem 50P: Q A skier of mass 70.0 kg is pulled up a slope by a motor-driven cable, (a) How much work is... Problem 51P: A 3.50-kN piano is lilted by three workers at constant speed to an apartment 25.0 m above the street... Problem 52P: While running, a person dissipates about 0.60 J of mechanical energy per step per kilogram of body... Problem 53P: The electric motor of a model train accelerates the train from rest to 0.620 m/s in 21.0 ms. The... Problem 54P: When an automobile moves with constant speed down a highway, most of the power developed by the... Problem 55P Problem 56P Problem 57P: A 1.50 103-kg car starts from rest and accelerates uniformly to 18.0 m/s in 12.0 s. Assume that,... Problem 58P: A 6.50 102-kg elevator starts from rest and moves upward for 3.00 s with constant acceleration... Problem 59P: The force acting on a particle varies as in Figure P5.59. Find the work done by the force as the... Problem 60P: An object of mass 3.00 kg is subject to a force Fx that varies with position as in Figure P5.60.... Problem 61P: The force acting on an object is given by Fx = (8x 16) N, where x is in meters, (a) Make a plot of... Problem 62AP: An outfielder throws a 0.150-kg baseball at a speed of 40.0 m/s and an initial angle of 30.0. What... Problem 63AP: A person doing a chin-up weighs 700 N, exclusive of the arms. During the first 25.0 cm of the lift,... Problem 64AP: A boy starts at rest and slides down a frictionless slide as in Figure P5.64. The bottom of the... Problem 65AP: A roller-coaster car of mass 1.50 103 kg is initially at the top of a rise at point . It then moves... Problem 66AP: A ball of mass m = 1.80 kg is released from rest at a height h = 65.0 cm above a light vertical... Problem 67AP: An archer pulls her bowstring back 0.400 m by exerting a force that increases uniformly from zero to... Problem 68AP: A block of mass 12.0 kg slides from rest down a frictionless 35.0 incline and is stopped by a strong... Problem 69AP: (a) A 75-kg man steps out a window and falls (from rest) 1.0 m to a sidewalk. What is his speed just... Problem 70AP: A toy gun uses a spring to project a 5.3-g soft rubber sphere horizontally. The spring constant is... Problem 71AP: Two objects (m1 = 5.00 kg and m2 = 3.00 kg) are connected by a light string passing over a light,... Problem 72AP: In a needle biopsy, a narrow strip of tissue is extracted from a patient with a hollow needle.... Problem 73AP: A 2.00 102-g particle is released from rest at point A on the inside of a smooth hemispherical bowl... Problem 74AP: The particle described in Problem 71 (Fig. P5.71) is released from point A at rest. Its speed at B... Problem 75AP: A light spring with spring constant 1.20 103 N/m hangs from an elevated support. From its lower end... Problem 76AP Problem 77AP: In terms of saving energy, bicycling and walking are far more efficient means of transportation than... Problem 78AP: Energy is conventionally measured in Calories as well as in joules. One Calorie in nutrition is 1... Problem 79AP: A ski jumper starts from rest 50.0 m above the ground on a frictionless track and flies off the... Problem 80AP: A 5.0-kg block is pushed 3.0 m up a vertical wall with constant speed by a constant force of... Problem 81AP: A childs pogo slick (Fig. P5.77) stores energy in a spring (k = 2.50 104 N/m). At position (x1 =... Problem 82AP: A hummingbird is able to hover because, as the wings move downward, they exert a downward force on... Problem 83AP: In the dangerous sport of bungee jumping, a daring student jumps from a hot air balloon with a... Problem 84AP: The masses of the javelin, discus, and shot are 0.80 kg, 2.0 kg, and 7.2 kg, respectively, and... Problem 85AP: A truck travels uphill with constant velocity on a highway with a 7.0 slope. A 50.-kg package sits... Problem 86AP: A daredevil wishes to bungee-jump from a hot-air balloon 65.0 m above a carnival midway. He will use... Problem 87AP Problem 88AP: An object of mass m is suspended from the top of a cart by a string of length L as in Figure P5.88a.... Problem 89AP: Three objects with masses m1 = 5.00 kg, m2 = 10.0 kg, and m3 = 15.0 kg, respectively, are attached... Problem 90AP Problem 91AP Problem 92AP: Two blocks, A and B (with mass 50.0 kg and 1.00 102 kg, respectively), are connected by a string,... Problem 43P: The system shown in Figure P5.43 is used to lift an object of mass m = 76.0 kg. A constant downward...
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Concept explainers
A skier goes down a 200 m slope. (a) If his altitude changes by 80 m during the run, what is his speed at the bottom if there is no friction? (b) If the skier’s mass is 70 kg and his final speed is actually 15 m/s, find the average force exerted by friction. (You don’t need to know the detailed shape or angle of the slope. Think of the “roller coaster” example.)
please show your work, including diagrams, algebraic equations, and enough written explanations that somebody who is not familiar with the problem could understand what you are doing
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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