University Physics with Modern Physics (14th Edition)
14th Edition
ISBN: 9780321973610
Author: Hugh D. Young, Roger A. Freedman
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 4, Problem 4.2DQ
A ball thrown straight up has zero velocity at its highest point. Is the ball in equilibrium at this point? Why or why not?
Expert Solution & Answer
Learn your wayIncludes step-by-step video
schedule03:41
Students have asked these similar questions
Grab a meter stick or any uniform thin piece of wood about 1m in length. (e.g. the handle of a broom
with the head removed). Place your index fingers at either end so that you are holding the stick up with
just two fingers. Move your fingers slowly together. Where do they end up? Describe the motion of your
fingers. Explain why this happens.
A basketball player of mass m=88.4 kg jumps straight up for a ball. To do this, he lowers his body d1=0.44 m, then he accelerates through this distance by forcefully straightening his legs. This player leaves the floor with a speed sufficient to carry him d2=0.56 m above the floor. Write an expression for the speed v with which the basketball player leaves the floor.
Write an expression for the speed v with wiich the basketball player leaves the floor.
Write an expression for the acceleration, a, of the basketball player during the leg-straightening.
Write an expression for the force upward force, FN, exerted on the basketball player by the floor during the leg straightening.
What is the magnitude, in newtons, of the force FN while the player is straightening his legs?
Some salvage divers are raising a rectangular box of treasure measuring1m × 1.3m × 1.9m from the bottom of the sea. They are using a cable which can handle a maximum force of 10 000 N without breaking. They raise the treasure from the bottom of the ocean at a constant speed. All goes well while the treasure is rising through the water but much to the despair of the salvors as soon as the treasure is clear of the water the cable breaks, dropping the treasure back into the briny deep. What are the maximum and minimum possible weights of the lost treasure?
Chapter 4 Solutions
University Physics with Modern Physics (14th Edition)
Ch. 4.1 - Figure 4.5 shows a force F acting on a crate. With...Ch. 4.2 - In which of the following situations is there zero...Ch. 4.3 - Rank the following situations in order of the...Ch. 4.4 - Prob. 4.4TYUCh. 4.5 - You are driving a car on a country road when a...Ch. 4 - Can a body be in equilibrium when only one force...Ch. 4 - A ball thrown straight up has zero velocity at its...Ch. 4 - A helium balloon hovers in midair, neither...Ch. 4 - When you fly in an airplane at night in smooth...Ch. 4 - If the two ends of a rope in equilibrium are...
Ch. 4 - You tie a brick lo the end of a rope and whirl the...Ch. 4 - When a car stops suddenly, the passengers tend to...Ch. 4 - Some people say that the force of inertia (or...Ch. 4 - A passenger in a moving bus with no windows...Ch. 4 - Suppose you chose the fundamental physical...Ch. 4 - Why is the earth only approximately an inertial...Ch. 4 - Does Newtons second law hold true for an observer...Ch. 4 - Some students refer to the quantity ma as the...Ch. 4 - The acceleration of a falling body is measured in...Ch. 4 - You can play catch with a softball in a bus moving...Ch. 4 - Students sometimes say that the force of gravity...Ch. 4 - Why can it hurt your foot more to kick a big rock...Ch. 4 - Its not the fall that hurts you; its the sudden...Ch. 4 - A person can dive into water from a height of 10 m...Ch. 4 - Why are cars designed to crumple in front and back...Ch. 4 - When a string barely strong enough lifts a heavy...Ch. 4 - A large crate is suspended from the end of a...Ch. 4 - Which feels a greater pull due to the earths...Ch. 4 - Why is it incorrect to say that 1.0 kg equals 2.2...Ch. 4 - A horse is hitched to a wagon. Since the wagon...Ch. 4 - True or false? You exert a push P on an object and...Ch. 4 - A large truck and a small compact car have a...Ch. 4 - When a car comes to a stop on a level highway,...Ch. 4 - A small compact car is pushing a large van that...Ch. 4 - Consider a tug-of-war between two people who pull...Ch. 4 - Boxes A and B are in contact on a horizontal,...Ch. 4 - A manual for student pilots contains this passage:...Ch. 4 - If your hands are wet and no towel is handy, you...Ch. 4 - If you squat down (such as when you examine the...Ch. 4 - When a car is hit from behind, the occupants may...Ch. 4 - In a head-on auto collision, passengers who are...Ch. 4 - In a head-on collision between a compact 1000-kg...Ch. 4 - Suppose you are in a rocket with no windows,...Ch. 4 - Two dogs pull horizontally on ropes attached to a...Ch. 4 - To extricate an SUV stuck in the mud, workmen use...Ch. 4 - BIO Jaw Injury. Due to a jaw injury, a patient...Ch. 4 - A man is dragging a trunk up the loading ramp of a...Ch. 4 - Forces F1 and F2act at a point. The magnitude of...Ch. 4 - An electron (mass = 9.11 1031 kg) leaves one end...Ch. 4 - A 68.5-kg skater moving initially at 2.40 m/s on...Ch. 4 - You walk into an elevator, step onto a scale, and...Ch. 4 - A box rests on a frozen pond, which serves as a...Ch. 4 - A dockworker applies a constant horizontal force...Ch. 4 - A hockey puck with mass 0.160 kg is at rest at the...Ch. 4 - A crate with mass 32.5 kg initially at rest on a...Ch. 4 - A 4.50-kg experimental cart undergoes an...Ch. 4 - A 2.75-kg cat moves in a straight line (the...Ch. 4 - A small 8.00-kg rocket burns fuel that exerts a...Ch. 4 - An astronauts pack weighs 17.5 N when she is on...Ch. 4 - Superman throws a 2400-N boulder at an adversary....Ch. 4 - BIO (a) An ordinary flea has a mass of 210 g. How...Ch. 4 - At the surface of Jupiters moon Io, the...Ch. 4 - A small car of mass 380 kg is pushing a large...Ch. 4 - BIO World-class sprinters can accelerate out of...Ch. 4 - The upward normal force exerted by the floor is...Ch. 4 - Boxes A and B are in contact on a horizontal,...Ch. 4 - A student of mass 45 kg jumps off a high diving...Ch. 4 - Section 4.6 Free-Body Diagrams 4.25Crates A and B...Ch. 4 - You pull horizontally on block B in Fig. F4.26,...Ch. 4 - A ball is hanging from a long siring that is tied...Ch. 4 - CP A .22-caliber rifle bullet traveling at 350 m/s...Ch. 4 - A chair of mass 12.0 kg is sitting on the...Ch. 4 - A large box containing your new computer sits on...Ch. 4 - CP A 5.60-kg bucket of water is accelerated upward...Ch. 4 - CP You have just landed on Planet X. You release a...Ch. 4 - Two adults and a child want to push a wheeled cart...Ch. 4 - CP An oil tankers engines have broken down, and...Ch. 4 - CP BIO A Standing Vertical Jump. Basketball player...Ch. 4 - CP An advertisement claims that a particular...Ch. 4 - BIO Human Biomechanics. The fastest pitched...Ch. 4 - BIO Human Biomechanics. The fastest served tennis...Ch. 4 - Two crates, one with mass 4.00 kg and the other...Ch. 4 - CP Two blocks connected by a light horizontal rope...Ch. 4 - CALC To study damage to aircraft that collide with...Ch. 4 - CP A 6.50-kg instrument is hanging by a vertical...Ch. 4 - BIO Insect Dynamics. The froghopper (Philaenus...Ch. 4 - A loaded elevator with very worn cables has a...Ch. 4 - CP After an annual checkup, you leave your...Ch. 4 - CP A nail in a pine board stops a 4.9-N hammer...Ch. 4 - CP Jumping to the Ground. A 75.0-kg man steps off...Ch. 4 - The two blocks in Fig. P4.48 are connected by a...Ch. 4 - CP Boxes A and B are connected to each end of a...Ch. 4 - CP Extraterrestrial Physics. You have landed on an...Ch. 4 - CP CALC A mysterious rocket-propelled object of...Ch. 4 - CALC The position of a training helicopter (weight...Ch. 4 - DATA The table gives automobile performance data...Ch. 4 - DATA An 8.00-kg box sits on a level floor. You...Ch. 4 - DATA You are a Starfleet captain going boldly...Ch. 4 - Prob. 4.56CPCh. 4 - BIO FORCES ON A DANCER'S BODY. Dancers experience...Ch. 4 - BIO FORCES ON A DANCERS BODY. Dancers experience...Ch. 4 - BIO FORCES ON A DANCER'S BODY. Dancers experience...Ch. 4 - The forces on a dancer can be measured directly...
Additional Science Textbook Solutions
Find more solutions based on key concepts
Colored aleurone in the kernels of com is due to the dominant allele R. The recessive allele r, when homozygous...
Concepts of Genetics (12th Edition)
Calculate the mass of NaCl in a 35-mL sample of a 1.3 M NaCl solution.
Introductory Chemistry (6th Edition)
What name is given to the zone of greatest seismic activity?
Applications and Investigations in Earth Science (9th Edition)
Match each of the following items with all the terms it applies to:
Human Physiology: An Integrated Approach (8th Edition)
1.3 Obtain a bottle of multivitamins and read the list of ingredients. What are four chemicals from the list?
Chemistry: An Introduction to General, Organic, and Biological Chemistry (13th Edition)
The bond angles in a regular polygon with n sides are equal to 180360n a. What are the bond angles in a regular...
Organic Chemistry (8th 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 small block is released on the top of a wedge that is placed on a horizontal floor as shown in the figure. Mass of wedge is M and angle of inclination of its start face is 0. Friction between wedge and floor is sufficient to prevent sliding and coefficient of friction between the wedge and the block is µ. The mass of the block be so that the wedge will not topple? m (A) 0 ≤ m <∞ if μ ≥ tano M (C) m< 3 sin 0(sin 0-u cos 0) if µ< tane M (B) 0 ≤ m <∞ if µarrow_forwardA 80.0 kg mail bag hangs by a vertical rope 3.5 m long. A postal worker then displaces the bag to a position 2.4 m sideways from its original position, always keeping the rope taut.arrow_forwardNeglecting air resistance, with what initial speed would you have to throw a ball into the air so that it reaches a maximum height of 1 Earth radius above the surface of the Earth? G = 6.67 x 10-11 m3 kg-1 s2 REarth = 6.37 × 106 m %3D MEarth = 5.97 × 1024 kgarrow_forwardA person steps horizontally off the roof of a single-story house that is 3.1 m high. When his feet hit theground below, he bends his knees such that his torso decelerates over a distance of 0.65 m before coming to astop. If the mass of his torso is 50 kg, what is the average net force exerted on his torso over this distance?arrow_forwardAssuming that the system is in equilibrium, find the value of m3, knowing that: r1=1.7 m r2=0.6 m r3=1.4 m m1=11.9 kg m2=3.2 kgarrow_forwardA small block sits at one end of a flat board that is 4.00 m long. The coefficients of friction between the block and the board are μs= 0.450 and μ = 0.400. The end of the board where the block sits is slowly raised until the angle the board makes with the horizontal is α0, and then the block starts to slide down the board. If the angle is kept equal to α0 as the block slides, what is the speed of the block when it reaches the bottom of the board? Express your answer with the appropriate units.arrow_forwardNOTE: Since no motion occurs in the y direction, direct application of the equilibrium equation EF, = 0 gives the same result for Ne. Try to solve the problem by first applying EF,=ma,, then v v+at. 200 N (10 s) 981 N (10 s) 45° (100 kg) v2 + Nc (10 s)arrow_forwardCaroline takes her baby sister Hannah to the neighborhood park and places her in the seatof the children’s swing. Caroline pulls the L = 1.8 m long chain back to make an angle θ = 26◦ withrespect to the vertical and lets 14 kg Hannah (swing mass included) go. (a) Determine Hannah’s speed at the lowest point in the trajectory. (b) What is the tension in the swing chain at this low point? Assume the chain itself has negligible mass.arrow_forwardA plastic disc is flicked up a sloping board. It has an initial speed of 1.6 ms ¹, but gradually slows down. The board is inclined at 18° to the horizontal, and when the disc is flicked its centre is 0.3 m from the top of the board, as shown below. The coefficient of sliding friction between the disc and the board is 0.05. Model the disc as a particle, and take the magnitude of the acceleration due to gravity to be g = = 9.8ms ². 0.3 m 18 j In your response to this question, underline vectors to distinguish them from scalar quantities. If the magnitude of a vector is unknown, use the vector letter to represent the magnitude. For example, write the magnitude of a vector A as A. (a) State the three forces acting on the disc while it is sliding up the board, and draw a force diagram to represent them, labelling each force appropriately and indicating the directions of the forces by marking the sizes of suitable angles. (b) Find expressions for the component forms the three forces, in…arrow_forwardAt a local swimming pool, the diving board is elevated h = 8.5 m above the pool's surface and overhangs the pool edge by L = 2 m. A diver runs horizontally along the diving board with a speed of v0 = 4.2 m/s and then falls into the pool. Neglect air resistance. Use a coordinate system with the horizontal x-axis pointing in the direction of the diver’s initial motion, and the vertical y-axis pointing up. Calculate the time tw it takes the diver to fall off the end of the diving board to the pool's surface in terms tw in seconds.arrow_forwardAt a local swimming pool, the diving board is elevated h = 8.5 m above the pool's surface and overhangs the pool edge by L = 2 m. A diver runs horizontally along the diving board with a speed of v0 = 4.2 m/s and then falls into the pool. Neglect air resistance. Use a coordinate system with the horizontal x-axis pointing in the direction of the diver’s initial motion, and the vertical y-axis pointing up. Determine the horizontal distance, dw in meters, from the edge of the pool to where the diver enters the water.arrow_forwardAt a local swimming pool, the diving board is elevated h = 8.5 m above the pool's surface and overhangs the pool edge by L = 2 m. A diver runs horizontally along the diving board with a speed of v0 = 4.2 m/s and then falls into the pool. Neglect air resistance. Use a coordinate system with the horizontal x-axis pointing in the direction of the diver’s initial motion, and the vertical y-axis pointing up. Enter an expression for the time tw it takes the diver to fall off the end of the diving board to the pool's surface in terms of v0, h, L, and g.arrow_forwardarrow_back_iosSEE MORE QUESTIONSarrow_forward_ios
Recommended textbooks for you
Principles of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
Physics for Scientists and Engineers with Modern ...PhysicsISBN:9781337553292Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
Physics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage Learning
Classical Dynamics of Particles and SystemsPhysicsISBN:9780534408961Author:Stephen T. Thornton, Jerry B. MarionPublisher:Cengage Learning
Physics for Scientists and Engineers, Technology ...PhysicsISBN:9781305116399Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
Glencoe Physics: Principles and Problems, Student...PhysicsISBN:9780078807213Author:Paul W. ZitzewitzPublisher:Glencoe/McGraw-Hill
Principles of Physics: A Calculus-Based Text
Physics
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
Physics for Scientists and Engineers with Modern ...
Physics
ISBN:9781337553292
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
Physics for Scientists and Engineers: Foundations...
Physics
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Cengage Learning
Classical Dynamics of Particles and Systems
Physics
ISBN:9780534408961
Author:Stephen T. Thornton, Jerry B. Marion
Publisher:Cengage Learning
Physics for Scientists and Engineers, Technology ...
Physics
ISBN:9781305116399
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
Glencoe Physics: Principles and Problems, Student...
Physics
ISBN:9780078807213
Author:Paul W. Zitzewitz
Publisher:Glencoe/McGraw-Hill
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