Conceptual Physical Science (6th Edition)
6th Edition
ISBN: 9780134060491
Author: Paul G. Hewitt, John A. Suchocki, Leslie A. Hewitt
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Textbook Question
Chapter 3, Problem 5RCQ
Why is it advantageous, in karate, to apply a force for a short time?
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
Based on a grade 11 physics student, answer the following question: In the Loblaws parking lot, the cart attendants decide to have some fun during a winter morning. The two attendants, Otis (72 kg) and Sito (82 kg), exert a minimum horizontal force of 29 N [F] to get their 153 kg carts to begin moving. After the carts have travelled for 11m, Otis and Sito jump on and the carts have a friction of 33 N. a. Draw a free body diagram of the carts at rest, and another one after they have travelled 11m, showing all forces and with values.
dropping an elephant and a mouse from a tall building, the mouse survived the fall but the elephant did not. Explain why the damage to the elephant was so catastrophic, while the mouse was not harmed.
A bullet of mass 0.005 kg moving with a
speed of 200 m/sec enters a heavy wooden
block and it is stopped after a distance of
50 cm. The average force exerted by the
block on the bullet is
1) 300 N
3) 200 N
2)-200 N
4) 400 N
Chapter 3 Solutions
Conceptual Physical Science (6th Edition)
Ch. 3 - Which has greater momentum: an automobile at rest...Ch. 3 - When a ball is hit with a given force, why does...Ch. 3 - Why is it a good idea to extend your bare hand...Ch. 3 - Why is it poor judgment to have the back of your...Ch. 3 - Why is it advantageous, in karate, to apply a...Ch. 3 - Prob. 6RCQCh. 3 - If a ball has the same speed just before being...Ch. 3 - In which of cases (1), (2), and (3) in Question 7...Ch. 3 - What does it mean to say that momentum (or any...Ch. 3 - When a cannonball is fired, momentum is conserved...
Ch. 3 - Railroad car A rolls at a certain speed and makes...Ch. 3 - If the equally massive railroad cars of Question...Ch. 3 - When is energy most evident?Ch. 3 - Cite an example in which a force is exerted on an...Ch. 3 - Which requires more work: lifting a 50-kg sack a...Ch. 3 - A car is raised a certain distance in a service...Ch. 3 - Two cars are raised to the same elevation on...Ch. 3 - If a moving car speeds up until it is going three...Ch. 3 - What is the relationship between work and power?Ch. 3 - What is the relationship between the gain in...Ch. 3 - Compared with the work that the brakes must supply...Ch. 3 - What will be the kinetic energy of the ram of a...Ch. 3 - An apple hanging from a limb has potential energy...Ch. 3 - Can a machine multiply input force? Input...Ch. 3 - If a machine multiplies force by a factor of 4,...Ch. 3 - What is the efficiency of a machine that...Ch. 3 - What becomes of energy when efficiency is lowered...Ch. 3 - What is the ultimate source of the energy supplied...Ch. 3 - What is the ultimate source of geothermal energy?Ch. 3 - Can we correctly say that hydrogen is a relatively...Ch. 3 - Show that the momentum for a 2-kg brick...Ch. 3 - Show that the impulse on a baseball that is hit...Ch. 3 - Show that when a 10-kg cart undergoes a 2.0-m/s...Ch. 3 - Show that when an impulse produced by a 12-N force...Ch. 3 - Show that 2.4 J of work is done when a force of...Ch. 3 - Calculate the work done when a 20-N force pushes a...Ch. 3 - Show that when a 3.0-kg book is lifted 2.0 m, its...Ch. 3 - Show that the gravitational potential energy of a...Ch. 3 - Show that the kinetic energy of a 1.0-kg book...Ch. 3 - Calculate the kinetic energy of a 84-kg scooter...Ch. 3 - Show that 24 J of work is done when a 3.0-kg block...Ch. 3 - Show that a 2,500,000-J change in kinetic energy...Ch. 3 - Show that 50 W of power is required to give a...Ch. 3 - Show that nearly 786 W of power is expended when a...Ch. 3 - Show that the efficiency of a machine that has an...Ch. 3 - In Chapter 1 we learned that acceleration a=vt,...Ch. 3 - A 10-kg bag of groceries is tossed onto a table at...Ch. 3 - An ostrich egg of mass m is tossed at a speed v...Ch. 3 - A 6-kg bail rolling at 3 m/s bumps into a pillow...Ch. 3 - At a baseball game, a ball of mass m = 0.15 kg...Ch. 3 - Jeannie Beanie (mass 40 kg), standing on slippery...Ch. 3 - A railroad diesel engine weighs four times as much...Ch. 3 - A 5-kg fish swimming at 1 m/s swallows an...Ch. 3 - Little Hudson (next page) holds the 10-kgbarbell...Ch. 3 - It you push a crate horizontally with a force of...Ch. 3 - A simple lever is used to lift a heavy load. When...Ch. 3 - The following questions refer to Problem 60: (a)...Ch. 3 - In raising a 6000-N piano with a pulley system,...Ch. 3 - The girl steadily pulls her end of the rope upward...Ch. 3 - How many watts of power do you expend when you...Ch. 3 - Show that 480 W of power is expended by a...Ch. 3 - When an average force F is exerted over a certain...Ch. 3 - Emily holds a banana of mass m over the edge of a...Ch. 3 - Starting from rest, Megan Zooms down a...Ch. 3 - The balls have different masses and speeds. Rank...Ch. 3 - Jogging Jake runs along a train flatcar that moves...Ch. 3 - Starting from rest, Marshall pushes crates across...Ch. 3 - A ball is released from rest at the left of the...Ch. 3 - The roller coaster ride starts from rest at point...Ch. 3 - Rank the scale readings from greatest to least....Ch. 3 - A lunar vehicle is tested on Earth at a speed of...Ch. 3 - In terms of impulse and momentum, why do airbags...Ch. 3 - Why are todays autos designed to crumple upon...Ch. 3 - If you throw a raw egg against a wall, youll break...Ch. 3 - In terms of impulse and momentum, when a boxer is...Ch. 3 - To throw a ball, do you exert an impulse on it? Do...Ch. 3 - Bronco dives from a hovering helicopter and finds...Ch. 3 - A pair of skaters who are initially at rest push...Ch. 3 - When you are traveling in your car at highway...Ch. 3 - You are at the front of a floating canoe near a...Ch. 3 - If you throw a ball horizontally while standing on...Ch. 3 - A fully dressed person is at rest in the middle of...Ch. 3 - Prob. 87ECh. 3 - In the previous chapter, rocket propulsion was...Ch. 3 - When vertically falling sand lands in a...Ch. 3 - In a movie, the hero jumps straight down from a...Ch. 3 - Freddy Frog drops vertically from a tree onto a...Ch. 3 - If your friend pushes a stroller four times as far...Ch. 3 - Which requires more work: stretching a strong...Ch. 3 - Two people of the same weight climb a flight of...Ch. 3 - Why do you run out of breath when running up the...Ch. 3 - A friend says that when twice as much works is...Ch. 3 - Compared with a pickup truck moving at a certain...Ch. 3 - When a cannon with a long barrel is fired, the...Ch. 3 - At what point in its motion is the KE of a...Ch. 3 - A physics instructor demonstrates energy...Ch. 3 - On a playground slide, a child has potential...Ch. 3 - Consider the identical balls released from rest on...Ch. 3 - Prob. 103ECh. 3 - In the absence of air resistance, a snowball...Ch. 3 - Youre on a rooftop and you throw one snowball...Ch. 3 - When a driver applies the brakes 10 keep a car...Ch. 3 - When the mass of a moving object is doubled, with...Ch. 3 - When the velocity of an object it doubled, by what...Ch. 3 - Which, if either, has greater momentum a 1-kg ball...Ch. 3 - If an objects kinetic energy is zero, what is its...Ch. 3 - If your momentum is zero, is your kinetic energy...Ch. 3 - Two lumps of clay with equal and opposite momenta...Ch. 3 - Consider Charlottes swinging-balls apparatus. If...Ch. 3 - Discuss the physics that explains how the girl in...Ch. 3 - Why bother using a machine if it cannot multiply...Ch. 3 - In the pulley system shown, Block A has a mass of...Ch. 3 - If an automobile had a 100% efficient engine,...Ch. 3 - The energy we need to live comes from chemically...Ch. 3 - To combat wasteful habits, we often speak of...Ch. 3 - What is the argument that dry-rock geothermal...Ch. 3 - What is the argument that the energy provided by a...Ch. 3 - What is the fuel that power a fuel cell in...Ch. 3 - Prob. 123ECh. 3 - Railroad cars are loosely coupled so that there is...Ch. 3 - Your friend says that the law of momentum...Ch. 3 - An ice sailcraft is stalled on a frozen lake on a...Ch. 3 - Will your answer to Question 126 be different if...Ch. 3 - Discuss the advisability of simply removing the...Ch. 3 - Suppose that three astronauts outside a spaceship...Ch. 3 - Discuss whether something can have energy without...Ch. 3 - Arrange the following four energy-transforming...Ch. 3 - What are the roles of water, energy, hydrogen, and...Ch. 3 - Does a car burn more fuel when its lights are...Ch. 3 - This may seem like an easy question for a physics...Ch. 3 - Your friend says that one way to improve air...Ch. 3 - Does the electric power produced by wind-powered...Ch. 3 - A red ball of mass m and a blue ball of mass 2m...Ch. 3 - No work is done by gravity on a bowling ball...Ch. 3 - Consider a bob attached by a stringa simple...Ch. 3 - Consider a satellite in a circular orbit above...Ch. 3 - A freight train rolls along a track with...Ch. 3 - In the absence of external forces, momentum is...Ch. 3 - If the running speed of Fast Freda doubles, what...Ch. 3 - Which of the following equations best illustrate s...Ch. 3 - Which of the following equations is most useful...Ch. 3 - How much work is done on a 200-kg crate that is...Ch. 3 - A circus diver drops from a high pole into water...Ch. 3 - A bicycle that travels twice as fast as another...Ch. 3 - A bicycle that travels twice as fast as another...Ch. 3 - A machine cannot multiply (a) force. (b) distance....
Additional Science Textbook Solutions
Find more solutions based on key concepts
15. (II) The gauge pressure in each of the four tires of an automobile is 240 kPa. If each tire has a “footprin...
Physics: Principles with Applications
Q9.22 Estimate your own moment of inertia about a vertical axis through the center of the top of your head when...
University Physics (14th Edition)
The power dissipated in the power cord.
Physics (5th Edition)
The pV-diagram of the Carnot cycle.
Sears And Zemansky's University Physics With Modern Physics
Briefly summarize the planetary properties we can in principle measure with current detection methods.
Life in the Universe (4th Edition)
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 dog weighing 36 kg, is standing on a flatboat so that he is 23 m from shore. He walks 16 m on the boat toward shore and then halts. The boat weighs 65 kg, and one can assume there is no friction between it and the water. How far is he from shore at the end of this time?arrow_forwardBumpers are built with springs that compress to provide a stopping force without, hopefully, denting the metal. Bumpers on cars are not of much use in a collision. To see why, calculate the magnitude of average force (to the nearest Newton) a bumper would have to exert if it brought a 1,870.99-kg car (a so-called compact model) to a rest in 15 cm when the car had an initial speed of 1.8 m/s.arrow_forwarda 4.5 kg dog stands on an 18 kg flatboat at distance D=6.1 m from the shore. It walks 2.4 m along the boat toward shore and then stops. Assuming no friction between the boat and the water, find how far the dog is then from the shore. (arrow_forward
- A tennis ball with a mass of 50 grams was hit with a racket. The ball experiences a force of 700 N during contact with the racket and moves away with a speed of 70 m/sec. Calculate the time for the contact between the ball and the racket?arrow_forwardTwo blocks with mass m1 = 1 kg, and m2 = 2 kg start from rest. The same force, F, acts on both of them. If the applied force is applied to each of them over equal distances, d, find the ratio of their final kinetic energies (KE1 / KE2)arrow_forwardTwo blocks with mass m1 = 1 kg, and m2 = 2 kg start from rest. The same force, F, acts on both of them. If the applied force is applied to each of them over equal times, t. Find the ratio of their final kinetic energies (KE1 / KE2)arrow_forward
- a baseball catcher puts on an exhibition by catching a 0.15 kg ball, dropped from a helicopter at a height of 100m above the catcher. If the catcher "gives" with the ball for 0.75 m (was originally 1m off the ground) while catching it, what is the average force exerted on the mitt by the ball?arrow_forwardOn a frictionless surface, a man wants to move forward, can it move forward? Explainarrow_forwardAn office worker smacks a table, bringing his hand to rest in 0.0025 seconds from an initial speed of 4.00 m/s. How much force is exerted on the table, taking the effective mass of his forearm and hand to be 1.5 kg? (Answer in 1 decimal place, in kilo-newtons, no unit) UNIT: kN Add your answerarrow_forward
- At time t = 0, constant force F→ begins to act on a rock moving through deep space in the +x direction.Three possible functions of its motion are:(1) x = 4t – 3(2) x = –4t2 + 6t – 3(3) x = 4t2 + 6t – 3arrow_forwardA student of mass 63 kg falls freely from rest and strikes the ground. During the collision with the ground, he comes to rest at a time of 0.04 seconds. The average force exerted on him by the ground is 18,000 N, where the upward direction is taken to be a positive direction. From what height did the student fall? Assume that the only force acting on him during the collision is only due to the groundarrow_forwardWhether or not an object (such as a plate, glass, or bone) breaks upon impact depends on the average force exerted on that object by the surface. When a 2.5 kg glass figure hits the floor, it will break if it experiences an average force of 538 N. When it hits a tile floor, the glass comes to a stop in 0.020 s. From what minimum height (in m) must the glass fall to experience sufficient force to break? m How would your answer change if the figure were falling to a padded or carpeted surface? Explain. The duration of the collision would be shorter, so the average force for a given change in momentum would be more.The duration of the collision would be longer, so the average force for a given change in momentum would be less. The duration of the collision would be longer, so the average force for a given change in momentum would be more.The duration of the collision would be shorter, so the average force for a given change in momentum would be less.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- University Physics Volume 1PhysicsISBN:9781938168277Author:William Moebs, Samuel J. Ling, Jeff SannyPublisher:OpenStax - Rice University
University Physics Volume 1
Physics
ISBN:9781938168277
Author:William Moebs, Samuel J. Ling, Jeff Sanny
Publisher:OpenStax - Rice University
Newton's Third Law of Motion: Action and Reaction; Author: Professor Dave explains;https://www.youtube.com/watch?v=y61_VPKH2B4;License: Standard YouTube License, CC-BY