Physics of Everyday Phenomena
9th Edition
ISBN: 9781259894008
Author: W. Thomas Griffith, Juliet Brosing Professor
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 7, Problem 17CQ
Which of Newton’s laws of motion are involved in justifying the principle of conservation of momentum? Explain.
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Chapter 7 Solutions
Physics of Everyday Phenomena
Ch. 7 - Does the length of time that a force acts on an...Ch. 7 - Two forces produce equal impulses, but the second...Ch. 7 - Is it possible for a baseball to have as large a...Ch. 7 - Are impulse and force the same thing? Explain.Ch. 7 - Are impulse and momentum the same thing? Explain.Ch. 7 - If a ball bounces off a wall so that its velocity...Ch. 7 - Is there an advantage to following through when...Ch. 7 - What is the advantage of a padded dashboard...Ch. 7 - What is the advantage of an air bag in reducing...Ch. 7 - If an air bag inflates too rapidly and firmly...
Ch. 7 - If you catch a baseball or softball with your bare...Ch. 7 - Suppose you move your hand forward to meet the egg...Ch. 7 - A truck and a bicycle are moving side by side with...Ch. 7 - Is the principle of conservation of momentum...Ch. 7 - A ball is accelerated down a fixed inclined plane...Ch. 7 - Two objects collide under conditions where...Ch. 7 - Which of Newtons laws of motion are involved in...Ch. 7 - A compact car and a large truck have a head-on...Ch. 7 - A fullback collides midair and head-on with a...Ch. 7 - Two ice skaters, initially at rest, push off one...Ch. 7 - Two shotguns are identical in every respect...Ch. 7 - When a cannon rigidly mounted on a large boat is...Ch. 7 - Is it possible for a rocket to function in empty...Ch. 7 - Suppose you are standing on a surface that is so...Ch. 7 - Suppose an astronaut in outer space suddenly...Ch. 7 - Suppose that on a perfectly still day, a sailboat...Ch. 7 - A skateboarder jumps on a moving skateboard from...Ch. 7 - A railroad car collides and couples with a second...Ch. 7 - Is the collision in question 28 elastic, partially...Ch. 7 - If momentum is conserved in a collision, does this...Ch. 7 - A ball bounces off a wall with a velocity whose...Ch. 7 - A ball bounces off a wall that is rigidly attached...Ch. 7 - A cue ball strikes an 8 ball of equal mass, which...Ch. 7 - Two lumps of clay traveling through the air in...Ch. 7 - Two lumps of clay, of equal mass, are traveling...Ch. 7 - Two cars of equal mass collide at right angles to...Ch. 7 - A car and a small truck traveling at right angles...Ch. 7 - A cue ball strikes a glancing blow against a...Ch. 7 - An average force of 4800 N acts for a time...Ch. 7 - What is the momentum of a 1300-kg car traveling...Ch. 7 - A bowling ball has a mass of 7 kg and a speed of...Ch. 7 - A force of 128 N acts on a ball for 0.45 s. If the...Ch. 7 - A 0.14-kg ball traveling with a speed of 40 m/s is...Ch. 7 - A ball experiences a change in momentum of 64...Ch. 7 - A 75-kg front-seat passenger in a car moving...Ch. 7 - A ball traveling with an initial momentum of 1.7...Ch. 7 - A ball traveling with an initial momentum of 5.1...Ch. 7 - A fullback with a mass of 108 kg and a velocity of...Ch. 7 - An ice skater with a mass of 70 kg pushes off...Ch. 7 - A rifle with a mass of 3.4 kg fires a bullet with...Ch. 7 - A rocket ship at rest in space gives a short blast...Ch. 7 - A railroad car with a mass of 13,000 kg collides...Ch. 7 - A 4150-kg truck traveling with a velocity of 12...Ch. 7 - For the two vehicles in exercise E16: a. Sketch to...Ch. 7 - A car with a mass of 1600 kg traveling with a...Ch. 7 - Refer to example box 7.2 and figures 7.17 and...Ch. 7 - A fast ball thrown with a velocity of 40 m/s...Ch. 7 - A bullet is fired into a block of wood sitting on...Ch. 7 - Consider two cases in which the same ball is...Ch. 7 - A car traveling at a speed of 22 m/s...Ch. 7 - A 1600-kg car traveling due east with a speed of...
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- The kinetic energy of an object is increased by a factor of 4. By what factor is the magnitude of its momentum changed? (a) 16 (b) 8 (c) 4 (d) 2 (e) 1arrow_forwardA ball of mass 250 g is thrown with an initial velocity of 25 m/s at an angle of 30 with the horizontal direction. Ignore air resistance. What is the momentum of the ball after 0.2 s? (Do this problem by finding the components of the momentum first, and then constructing the magnitude and direction of the momentum vector from the components.)arrow_forwardThe momentum of an object is increased by a factor of 4 in magnitude. By what factor is its kinetic energy changed? (a) 16 (b) 8 (c) 4 (d) 2 (e) 1arrow_forward
- What external force is responsible for changing the momentum of a car moving along a horizontal road?arrow_forwardA mother pushes her son in a stroller at a constant speed of 1.52 m/s. The boy tosses a 56.7-g tennis ball straight up at 1.75 m/s and catches it. The boys father sits on a bench and watches. a. According to the mother, what are the balls initial and final momenta? b. According to the father, what are the balls initial and final momenta? c. According to the mother, is the balls momentum ever zero? If so, when? If not, why not? d. According to the father, is the balls momentum ever zero? If so, when? If not, why not?arrow_forwardCan objects in a system have momentum while the momentum of the system is zero? Explain your answer.arrow_forward
- A model rocket engine has an average thrust of 5.26 N. It has an initial mass of 25.5 g, which includes fuel mass of 12.7 g. The duration of its burn is 1.90 s. (a) What is the average exhaust speed of the engine? (b) This engine is placed in a rocket body of mass 53.5 g. What is the final velocity of the rocket if it were to be fired from rest in outer space by an astronaut on a spacewalk? Assume the fuel burns at a constant rate.arrow_forwardAn object that has a small mass and an object that has a large mass have the same momentum. Which object has the largest kinetic energy?arrow_forwardA car crashes into a large tree that does not move. The car goes from 30 m/s to 0 in 1.3 m. (a) What impulse is applied to the driver by the seatbelt, assuming he follows the same motion as the car? (b) What is the average force applied to the driver by the seatbelt?arrow_forward
- Must the total energy of a system be conserved whenever its momentum is conserved? Explain why or why not.arrow_forwardProblems 44 and 45 are paired. C A model rocket is shot straight up. As it reaches the highest point in its trajectory, it explodes in midair into three pieces with velocities indicated by the arrows in Figure P10.44, as viewed from directly above the explosion. Rank the mass of each piece in order from smallest to largest and justify your answer. FIGURE P10.44 Problems 44 and 45.arrow_forward(a) At what speed would a 2.00104 -kg airplane have to fly to have a momentum of 1.60109kgm/s (the same as the ship's momentum in the problem above)? (b) What is the plane's momentum when it is taking off at a speed of 60.0 m/s? (c) If the ship is an aircraft carrier that launches these airplanes with a catapult, discuss the implications of your answer to (b) as it relates to recoil effects of the catapult on the ship.arrow_forward
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Impulse Derivation and Demonstration; Author: Flipping Physics;https://www.youtube.com/watch?v=9rwkTnTOB0s;License: Standard YouTube License, CC-BY