College Physics: A Strategic Approach (4th Edition)
4th Edition
ISBN: 9780134609034
Author: Randall D. Knight (Professor Emeritus), Brian Jones, Stuart Field
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Textbook Question
Chapter 4, Problem 31P
Problems 27 through 29 show a free-body diagram. For each problem, (a) redraw the free-body diagram and (b) write a short description of a real object for which this is the correct free-body diagram. Use the situations described in Conceptual Examples 4.1, 4.2, and 4.3 as models of what a description should be like.
29.
Figure P4.29
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
1. A ball of mass m is attached to a string of length L. The ball is then swung in a
circle of radius r such that the string traces out the surface of a cone. For this problem
we will neglect air resistance.
a. Sketch a pictorial representation of the physical situation and label any quantities of
interest. In addition, establish a coordinate system for this problem and draw a free
body diagram for the ball. (See sections 1.7 and 5.7 of the text on how to draw a
correct pictorial representation and free body diagram.)
b. Write down Newton's Second Law using the coordinate system from part (a) and
the forces identified on your free body diagram.
c. Determine a symbolic expression for the tension T in the string and the angular
velocity w of the ball. These should be expressed in terms of the given quantities L,
m, r and the acceleration due to gravity, g. Check the physical units of
expressions to make sure that you get the units of force and angular velocity.
your
d. Suppose that we…
A
В
In researching the forces that act on flying birds, scientists studied the motion of cockatiels’ bodies as they fly in horizontal flight. As the birds beat their wings, their bodies move up and down. Given is the vertical acceleration of a cockatiel’s body during one wing beat, consisting of an upstroke followed by a downstroke.
a. If the bird’s mass is 87 g, what is the maximum net vertical force exerted on the bird?b. The bird is held in level flight due to the force exerted on it by the air as the bird beats its wings. What is the maximum value of this force due to the air?
Chapter 4 Solutions
College Physics: A Strategic Approach (4th Edition)
Ch. 4 - If an object is not moving, does that mean that...Ch. 4 - An object moves in a straight line at a constant...Ch. 4 - If you know all of the forces acting on a moving...Ch. 4 - Three arrows are shot horizontally. They have left...Ch. 4 - Prob. 5CQCh. 4 - Internal injuries in vehicular acci-dents may be...Ch. 4 - Heres a great everyday use of the physics...Ch. 4 - Prob. 8CQCh. 4 - Suppose you are an astronaut in deep space, far...Ch. 4 - Jonathan accelerates away from a stop sign. His...
Ch. 4 - Prob. 11CQCh. 4 - Prob. 12CQCh. 4 - Josh and Taylor, standing face-to-face on...Ch. 4 - A person sits on a sloped hillside. Is it ever...Ch. 4 - Walking without slipping requires a static...Ch. 4 - Figure 4.30 b showed a situation in which the...Ch. 4 - Prob. 17CQCh. 4 - Prob. 18CQCh. 4 - The tire on this drag racer is severely twisted:...Ch. 4 - Suppose that, while in a squatting position, you...Ch. 4 - A block has acceleration a when pulled by a...Ch. 4 - A 5.0 kg block has an acceleration of 0.20 m/s2...Ch. 4 - Tennis balls experience a large drag force. A...Ch. 4 - A group of students is making model cars that will...Ch. 4 - A person gives a box a shove so that it slides up...Ch. 4 - Prob. 26MCQCh. 4 - As shown in the chapter, scallops use jet...Ch. 4 - Prob. 28MCQCh. 4 - Prob. 29MCQCh. 4 - Dave pushes his four-year-old son Thomas across...Ch. 4 - Figure Q4.29 shows block A sitting on top of block...Ch. 4 - Whiplash injuries during an automobile accident...Ch. 4 - An automobile has a head-on collision. A passenger...Ch. 4 - In a head-on collision, an infant is much safer in...Ch. 4 - Problems 4 through 6 show two forces acting on an...Ch. 4 - Problems 4 through 6 show two forces acting on an...Ch. 4 - Problems 4 through 6 show two forces acting on an...Ch. 4 - Prob. 7PCh. 4 - Prob. 8PCh. 4 - A baseball player is sliding into second base....Ch. 4 - A jet plane is speeding down the runway during...Ch. 4 - A skier is sliding down a 15 slope. Friction is...Ch. 4 - A falcon is hovering above the ground, then...Ch. 4 - Figure P4.13 shows an acceleration-versus-force...Ch. 4 - A constant force applied to object A causes it to...Ch. 4 - A compact car has a maximum acceleration of 4.0...Ch. 4 - Prob. 16PCh. 4 - A constant force is applied to an object, causing...Ch. 4 - A man pulling an empty wagon causes it to...Ch. 4 - Prob. 19PCh. 4 - Scallops eject water from their shells to provide...Ch. 4 - Figure P4.21 shows an objects...Ch. 4 - Prob. 22PCh. 4 - Two children fight over a 200 g stuffed bear. The...Ch. 4 - Prob. 24PCh. 4 - Prob. 25PCh. 4 - Prob. 26PCh. 4 - Prob. 27PCh. 4 - Prob. 28PCh. 4 - Problems 27 through 29 show a free-body diagram....Ch. 4 - Problems 27 through 29 show a free-body diagram....Ch. 4 - Problems 27 through 29 show a free-body diagram....Ch. 4 - Prob. 32PCh. 4 - Problems 30 through 38 describe a situation. For...Ch. 4 - Problems 30 through 38 describe a situation. For...Ch. 4 - Problems 30 through 38 describe a situation. For...Ch. 4 - Problems 30 through 38 describe a situation. For...Ch. 4 - Problems 30 through 38 describe a situation. For...Ch. 4 - Prob. 38PCh. 4 - Problems 30 through 38 describe a situation. For...Ch. 4 - Problems 30 through 38 describe a situation. For...Ch. 4 - Prob. 41PCh. 4 - Prob. 42PCh. 4 - Three ice skaters, numbered 1, 2, and 3, stand in...Ch. 4 - A girl stands on a sofa. Identify all the...Ch. 4 - A car is skidding to a stop on a level stretch of...Ch. 4 - Squid use jet propulsion for rapid escapes. A...Ch. 4 - Prob. 47GPCh. 4 - Prob. 48GPCh. 4 - Prob. 49GPCh. 4 - Prob. 50GPCh. 4 - Prob. 51GPCh. 4 - Prob. 52GPCh. 4 - Problems 49 through 61 describe a situation. For...Ch. 4 - Problems 49 through 61 describe a situation. For...Ch. 4 - Problems 49 through 61 describe a situation. For...Ch. 4 - Prob. 56GPCh. 4 - Prob. 57GPCh. 4 - Problems 49 through 61 describe a situation. For...Ch. 4 - Problems 49 through 61 describe a situation. For...Ch. 4 - Prob. 60GPCh. 4 - Problems 49 through 61 describe a situation. For...Ch. 4 - Problems 49 through 61 describe a situation. For...Ch. 4 - Problems 49 through 61 describe a situation. For...Ch. 4 - Problems 49 through 61 describe a situation. For...Ch. 4 - A bag of groceries is on the back seat of your car...Ch. 4 - A car has a mass of 1500 kg. If the driver applies...Ch. 4 - Prob. 67GPCh. 4 - Prob. 69GPCh. 4 - Prob. 70GPCh. 4 - Prob. 71GPCh. 4 - The froghopper, champion leaper of the insect...Ch. 4 - A beach ball is thrown straight up, and some time...Ch. 4 - If your car is stuck in the mud and you dont have...Ch. 4 - Prob. 75MSPPCh. 4 - Prob. 76MSPPCh. 4 - If your car is stuck in the mud and you don't have...
Additional Science Textbook Solutions
Find more solutions based on key concepts
The distance towards each speaker to observe destructive interference.
Physics (5th Edition)
66. Show that when a metal rod L meters long moves at speed v perpendicular to field lines, the magnetic force...
College Physics
3. What is free-fall, and why does it make you weightless? Briefly describe why astronauts are weightless in th...
The Cosmic Perspective (8th Edition)
7.16 • BIO Tendons. Tendons are strong elastic fibers that attach muscles to hones. To a reasonable approximati...
University Physics with Modern Physics (14th Edition)
Making a Living. Consider various methods by which life “makes a living” (the ways in which it acquires energy ...
Life in the Universe (4th Edition)
Recall the motion of the block in part B. For each force that you identified, state whether that force did posi...
Tutorials in Introductory Physics
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 ball hanging from a light string or rod can be used as an accelerometer (a device that measures acceleration) as shown in Figure P5.18. What force causes the deflection of the ball? Is the cart in the lower part of the photo an inertial reference frame? How can the balls deflection be used to find the carts acceleration? In which direction is the cart accelerating? Explain your answers.arrow_forwardA block is placed on a frictionless 30 degree incline.the mass of the block is m=30kg. a.draw a free body diagram of the block.Choose the x-axis in the direction of the incline.arrow_forwardA rifle shoots a 4.30 g bullet out of its barrel. The bullet has a muzzle velocity of 985 m/s just as it leaves the barrel. Assuming a constant horizontal acceleration over a distance of 43.0 cm starting from rest, with no friction between the bullet and the barrel. What force does the rifle exert on the bullet while it is in the barrel? b. Draw a free-body diagram of the bullet while it is in the barrel. Draw a free-body diagram of the bullet just after it has left the barrel. d. How many g 's of acceleration does the rifle give this bullet? e. For how long a time is the bullet in the barrel? a. с. The figarrow_forward
- You want to move a heavy box with mass 30.0 kg across a carpeted floor. You pull hard on one of the edges of the box at an angle 30∘ above the horizontal with a force of magnitude 240 N, causing the box to move horizontally. The force of friction between the moving box and the floor has magnitude 41.5 N . 1. What is the box's acceleration just after it begins to move? 2. Draw a free body diagram for the box, assuming that the positive-x axis is to the left, and the positive-y axis is upward.arrow_forwardQuestion 1 - A light block of mass m and a heavy block of mass M are attached to the ends of a rope. A student holds the heavier block and lets the lighter block hang below it, as shown in the figure. Then she lets go. Air resistance can be neglected. A. What is the tension in the rope while the blocks are being held? Explain. Marrow_forwardA 1.0 kg box is found at the top of a frictionless plane inclined at 30.0°. Given the system as shown below do the following: a. Draw a free-body diagram for this system. b. Show the component equations (Fx and Fy) in terms of variables only. c. Calculate the magnitude of the acceleration of the box.arrow_forward
- Problem 3: You need to push a box across carpet. The box and its contents have a mass of 75 kg. The coefficients of static friction and kinetic friction between the box and the carpet are 0.60 and 0.40, respectively. A. You push horizontally on the box with a force of 300 N. Draw a free-body diagram for this scenario. What is the magnitude of all the individual forces that act on the box? B. You now push horizontally on the box with constant force of 500 N. Draw a free body diagram that clearly labels each force. Calculate the magnitude of each individual force that acts on the box. C. What is the net force and acceleration for the box while you push with the 500 N?arrow_forwardPiles of snow on slippery roofs can become dangerous projectiles as they melt. Consider a chunk of snow at the ridge of a roof with a slope of 32 degrees. a.) What is the minimum value of the coefficient of static friction that will keep the snow from sliding down? Express your answer using two significant figures. b.) As the snow begins to melt, the coefficient of static friction decreases and the snow finally slips. Assuming that the distance from the chunk to the edge of the roof is 5.0 m and the coefficient of kinetic friction is 0.10, calculate the speed of the snow chunk when it slides off the roof. Express your answer to two significant figures and include the appropriate units. c.) f the roof edge is 12.5 m above ground, estimate the speed of the snow when it hits the ground. Express your answer to two significant figures and include the appropriate units.arrow_forwardAn aircraft carrier uses a device called a catapult to help accelerate jets to the speed needed for take off. The flight decks on these carriers have length d = 82 m. A jet with a mass of m = 12571 kg can be accelerated from rest to a speed of v = 49 m/s by the end of the flight deck. A.) calculate the numerical value of the magnitude of force F in newtons. B.) Wht is the numerical value of the ratio of the launch force F to the jets weight?arrow_forward
- A cardboard box rests on the floor of an elevator. The box has a mass m = 2.75 kg and the elevator has an upward acceleration of a. a. Write an expression for the sum of the forces acting on the box in the y-direction, ΣFy, given that up is the positive y-direction. Your answer should be in terms of FN, m, and g. b. Write an expression for the normal force, FN, that the block experiences in terms of the elevator's acceleration, the block's mass, and the acceleration of gravity. c. If the elevator's acceleration has a magnitude of g in the downward direction, what would the normal force, FN1 be in Newtons? d.If the elevator's acceleration had a magnitude of g in the upward direction, what would the normal force FN2 be in Newtons?arrow_forwardProblem B1. Two blocks A and B are held together (they move as one) while a force F of magnitude 200 N pulls block B to the right forming an angle 0 = 20 °. Block B is on a rough horizontal surface with a coefficient of kinetic friction of 0.800. The masses of the blocks are mā = 6.00 kg and mB = 7.00 kg. B. Figure B1. Problem diagram B1 B) Draw a free-body diagram showing all the forces directly applied to block B.arrow_forwardA block slides down a frictionless plane having an inclination of θ = 20.00. The block starts from rest at the top, and the length of the incline is 2.00 m. a. Draw a free-body diagram of the block. b. Find the acceleration of the block, and c. Its speed when it reaches the bottom of the incline.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Physics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage Learning
Physics for Scientists and Engineers: Foundations...
Physics
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Cengage Learning
Drawing Free-Body Diagrams With Examples; Author: The Physics Classroom;https://www.youtube.com/watch?v=3rZR7FSSidc;License: Standard Youtube License