Physical Universe
16th Edition
ISBN: 9780077862619
Author: KRAUSKOPF, Konrad B. (konrad Bates), Beiser, Arthur
Publisher: Mcgraw-hill Education,
expand_more
expand_more
format_list_bulleted
Videos
Textbook Question
Chapter 3, Problem 31MC
A 10,000-kg freight car moving at 2 m/s collides with a stationary 15,000-kg freight car. The two cars couple together and move off at
- a. 0.8 m/s
- b. 1 m/s
- c. 1.3 m/s
- d. 2 m/s
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Chapter 3 Solutions
Physical Universe
Ch. 3 - Which of the following is not a unit of work? a....Ch. 3 - An object at rest may have a. velocity b. momentum...Ch. 3 - A moving object must have which one or more of the...Ch. 3 - When the momentum of a moving object is increased,...Ch. 3 - The total amount of energy (including the rest...Ch. 3 - When the speed of a moving object is halved, a....Ch. 3 - Two balls, one of mass 5 kg and the other of mass...Ch. 3 - A bomb dropped from an airplane explodes in...Ch. 3 - The operation of a rocket is based upon a. pushing...Ch. 3 - A spinning skater whose arms are at her sides then...
Ch. 3 - Prob. 11MCCh. 3 - The formula 12 mv2 for kinetic energy a. is the...Ch. 3 - A spacecraft has left the earth and is moving...Ch. 3 - The upper limit to the speed of an object with...Ch. 3 - It is not true that a. light is affected by...Ch. 3 - Albert Einstein did not discover that a. the...Ch. 3 - The work done in holding a 50-kg object at a...Ch. 3 - The work done in lifting 30 kg of bricks to a...Ch. 3 - A total of 4900 J is used to lift a 50-kg mass....Ch. 3 - The work a 300-W electric grinder can do in 5.0...Ch. 3 - A 150-kg yak has an average power output of 120 W....Ch. 3 - A 40-kg boy runs up a flight of stairs 4 m high in...Ch. 3 - Car A has a mass of 1000 kg and is moving at 60...Ch. 3 - A 1-kg object has a potential energy of 1 J...Ch. 3 - A 1-kg object has kinetic energy of 1 J when its...Ch. 3 - The 2-kg blade of an ax is moving at 60 m/s when...Ch. 3 - The highest MA that can be obtained by a system of...Ch. 3 - A machine has a MA of 6.0. The work input needed...Ch. 3 - A person uses a force of 300 N to pry up one end...Ch. 3 - A 1-kg ball is thrown in the air. When it is 10 m...Ch. 3 - A 10,000-kg freight car moving at 2 m/s collides...Ch. 3 - A 30-kg girl and a 25-kg boy are standing on...Ch. 3 - An object has a rest energy of 1 J when its mass...Ch. 3 - The smallest part of the total energy of the ball...Ch. 3 - The lightest particle in an atom is an electron,...Ch. 3 - A person holds a 10-kg package 1.2 m above the...Ch. 3 - Under what circumstances (if any) is no work done...Ch. 3 - The sun exerts a gravitational force of 4.0 1028...Ch. 3 - A crate is pushed across a horizontal floor at...Ch. 3 - A total of 490 J of work is needed to lift a body...Ch. 3 - A woman eats a cupcake and proposes to work off...Ch. 3 - The acceleration of gravity on the surface of Mars...Ch. 3 - The kilowatt-hour is a unit of what physical...Ch. 3 - The motor of a boat develops 60 kW when the boats...Ch. 3 - How much power must the legs of a 70-kg man...Ch. 3 - A weightlifter raises a 70-kg barbell from the...Ch. 3 - An escalator 14 m long is carrying a 70-kg person...Ch. 3 - A 700-kg horse whose power output is 1.0 hp is...Ch. 3 - A persons metabolic processes can usually operate...Ch. 3 - A crane whose motor has a power input of 5.0 kW...Ch. 3 - A total of 104 kg of water per second flows over a...Ch. 3 - Which of these energies might correspond to the KE...Ch. 3 - What is the speed of an 800-kg car whose KE is 250...Ch. 3 - A moving object whose initial KE is 10 J is...Ch. 3 - Is the work needed to bring a cars speed from 0 to...Ch. 3 - A 1-kg salmon is hooked by a fisherman and it...Ch. 3 - Prob. 22ECh. 3 - How long will it take a 1000-kg car with a power...Ch. 3 - Does every moving body possess kinetic energy?...Ch. 3 - As we will learn in Chap. 6, electric charges of...Ch. 3 - A 60-kg woman jumps off a wall 80 cm high and...Ch. 3 - Why does a nail become hot when it is hammered...Ch. 3 - A 3-kg stone is dropped from a height of 100 m....Ch. 3 - Prob. 29ECh. 3 - Prob. 30ECh. 3 - A ball is dropped from a height of 1 m and loses...Ch. 3 - A person sitting under a coconut palm is struck by...Ch. 3 - A skier is sliding downhill at 8 m/s when she...Ch. 3 - A force of 10 N is used to lift a 600-g ball from...Ch. 3 - A person uses a force of 49 N to raise a 30-kg...Ch. 3 - Prob. 36ECh. 3 - The human forearm is a class III lever. Find the...Ch. 3 - A ramp 20 m long slopes down 1.2 m to the edge of...Ch. 3 - In an effort to lose weight, a person runs 5 km...Ch. 3 - An 80-kg crate is raised 2 m from the ground by a...Ch. 3 - An 800-kg car coasts down a hill 40 m high with...Ch. 3 - (a) When an object at rest explodes into two parts...Ch. 3 - A golf ball and a Ping-Pong ball are dropped in a...Ch. 3 - Is it possible for an object to have more kinetic...Ch. 3 - What happens to the momentum of a car when it...Ch. 3 - The speed of an airplane doubles in flight. (a)...Ch. 3 - When the kinetic energy of an object is doubled,...Ch. 3 - What, if anything, happens to the speed of a...Ch. 3 - A ball of mass m rolling on a smooth surface...Ch. 3 - A railway car is at rest on a frictionless track....Ch. 3 - An empty dump truck coasts freely with its engine...Ch. 3 - A boy throws a 4-kg pumpkin at 8 m/s to a 40-kg...Ch. 3 - A 30-kg girl who is running at 3 m/s jumps on a...Ch. 3 - A 70-kg man and a 50-kg woman are in a 60-kg boat...Ch. 3 - The 176-g head of a golf club is moving at 45 m/s...Ch. 3 - A 40-kg skater moving at 4 m/s overtakes a 60-kg...Ch. 3 - The two skaters of Exercise 56 are moving in...Ch. 3 - A 1000-kg car moving east at 80 km/h collides...Ch. 3 - As the polar ice caps melt, the length of the day...Ch. 3 - All helicopters have two rotors. Some have both...Ch. 3 - The earthquake that caused the Indian Ocean...Ch. 3 - What are the two postulates from which Einstein...Ch. 3 - The theory of relativity predicts a variety of...Ch. 3 - What physical quantity will all observers always...Ch. 3 - The length of a rod is measured by several...Ch. 3 - Under what circumstances does it become...Ch. 3 - Why is it impossible for an object to move faster...Ch. 3 - The potential energy of a golf ball in a hole is...Ch. 3 - What is the effect on the law of conservation of...Ch. 3 - A certain walking person uses energy at an average...Ch. 3 - One kilogram of water at 0C contains 335 kJ of...Ch. 3 - When 1 g of gasoline is burned in an engine, about...Ch. 3 - Approximately 5.4 106 J of chemical energy is...Ch. 3 - Approximately 4 109 kg of matter is converted...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- A 45.0-kg girl is standing on a 150.-kg plank. The plank, originally at rest, is free to slide on a frozen lake, which is a flat, frictionless surface. The girl begins to walk along the plank at a constant velocity of 1.50 m/s to the right relative to the plank. (a) What is her velocity relative to the surface of the ice? (b) What is the velocity of the plank relative to the surface of the ice?arrow_forwardA 2.00 1O3-kg car moving cast at 10.0 m/s collides with a 3.00 103-kg car moving north. The cars stick together and move as a unit after the collision, at an angle of 40.0 north of east and a speed of 5.22 m/s. Find the speed and direction of the 3.00 103-kg car before the collision.arrow_forwardA 45.0-kg girl is standing on a 150-kg plank. Both are originally at rest on a frozen lake that constitutes a frictionless, flat surface. The girl begins to walk along the plank at a constant velocity of 1.50i m/s relative to the plank. (a) What is the velocity of the plank relative to the ice surface? (b) What is the girls velocity relative to the ice surface?arrow_forward
- A basketball is tossed up into the air, falls freely, and bounces from the wooden floor. From the moment after the player releases it until the ball reaches the top of its bounce, what is the smallest system for which momentum is conserved? (a) the ball (b) the ball plus player (c) the ball plus floor (d) the ball plus the Earth (e) momentum is not conserved for any systemarrow_forwardA 57.0-g tennis ball is traveling straight at a player at 21.0 m/s. The player volleys the ball straight back at 25.0 m/s. If the ball remains in contact with the racket for 0.060 s, what average force acts on the ball? (a) 22.6 N (b) 32.5 N (c) 43.7 N (d) 72.1 N (e) 102 Narrow_forward(a) What is the mass of a large ship that has a momentum of 1.60109kgm/s, when the ship is moving at a speed of 48.0 km/h? (b) Compare the ship's momentum to the momentum of a 1100-kg artillery shell fired at a speed of 1200 m/s.arrow_forward
- (a) What is the momentum of a garbage truck that is 1.20104 kg and is moving at 10.0 m/s ? (b) At what speed would an 8.00-kg trash can have the same momentum as the truck?arrow_forwardA car is stopped for a traffic signal. When the light turns green, the car accelerates, increasing its speed from 0 to 5.20 m/s in 0.832 s. What are the magnitudes of (a) the linear impulse and (b) the average total force experienced by a 70.0-kg passenger in the car during the time the car accelerates?arrow_forwardAn elephant and a hunter are having a confrontation. a. Calculate the momentum of the 2000.0-kg elephant charging the hunter at a speed of 7.50 m/s. b. Calculate the ratio of the elephant’s momentum to the momentum of a 0.0400-kg tranquilizer dart fired at a speed of 600 m/s. c. What is the momentum of the 90.0-kg hunter running at 7.40 m/s after missing the elephant?arrow_forward
- A 44.0-kg child finds himself trapped on the surface of a frozen lake, 10.0 m from the shore. The child slips with each step on the frictionless ice and remains the same distance from the shoreline. Egged on by his parents, he throws a 0.750-kg ball he is carrying toward the center of the lake with a horizontal speed of 1.50 m/s, in the direction opposite that of the shoreline. a. Does the act of throwing the ball cause the child to move? If so, what are the speed and the direction of his motion with respect to the Earth? b. What are the forces acting on the child when he throws the ball?arrow_forwardA 1.25-kg wooden block rests on a table over a large hole as in Figure P6.84. A 5.00-g bullet with an initial velocity vi is fired upward into the bottom of the block and remains in the block after the collision. The block and bullet rise to a maximum height of 22.0 cm. (a) Describe how you would find the initial velocity of the bullet using ideas you have learned in this topic, (b) Calculate the initial velocity of the bullet from the information provided.arrow_forward(a) Calculate the momentum of a 2000-kg elephant charging a hunter at a speed of 7.50 m/s. (b) Compare the elephant's momentum with the momentum of a 0.0400-kg tranquilizer dart fired at a speed of 600 m/s. (c) What is the momentum of the 90.0-kg hunter running at 7.40 m/s after missing the elephant?arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
College PhysicsPhysicsISBN:9781305952300Author:Raymond A. Serway, Chris VuillePublisher:Cengage Learning
Glencoe Physics: Principles and Problems, Student...PhysicsISBN:9780078807213Author:Paul W. ZitzewitzPublisher:Glencoe/McGraw-Hill
College PhysicsPhysicsISBN:9781285737027Author:Raymond A. Serway, Chris VuillePublisher:Cengage Learning
Principles of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
College PhysicsPhysicsISBN:9781938168000Author:Paul Peter Urone, Roger HinrichsPublisher:OpenStax College
College Physics
Physics
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Cengage Learning
Glencoe Physics: Principles and Problems, Student...
Physics
ISBN:9780078807213
Author:Paul W. Zitzewitz
Publisher:Glencoe/McGraw-Hill
College Physics
Physics
ISBN:9781285737027
Author:Raymond A. Serway, Chris Vuille
Publisher:Cengage Learning
Principles of Physics: A Calculus-Based Text
Physics
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
College Physics
Physics
ISBN:9781938168000
Author:Paul Peter Urone, Roger Hinrichs
Publisher:OpenStax College
Momentum | Forces & Motion | Physics | FuseSchool; Author: FuseSchool - Global Education;https://www.youtube.com/watch?v=DxKelGugDa8;License: Standard YouTube License, CC-BY