College Physics: A Strategic Approach (3rd Edition)
3rd Edition
ISBN: 9780321879721
Author: Randall D. Knight (Professor Emeritus), Brian Jones, Stuart Field
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 4, Problem 5CQ
A carpenter wishes to tighten the heavy head of his hammer onto its light handle. Which method shown in Figure Q4.51 will better tighten the head? Explain.
Figure Q4.5
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Michael Jordan has a portable basketball hoop in his driveway. He has set the basket at 8 ft (2.4 m) high so he can practice dunking the ball (he’s a bit older now, so he can’t quite jump “Air” Jordan style). He slams the ball through the hoop and then hangs on to the rim. This exerts a downward force of 600 N on the front of the rim. The front of the rim is 1.1 m in front of the front edge of the portable hoop’s base. The mass of the whole portable basketball hoop is 70 kg. The center of gravity of the portable hoop is 1.0 m behind the front edge of the base.
How much torque is produced around the front of the hoop base by the 600 N force Air Jordan exerts on the front of the rim?
How much torque is needed to tip the hoop?
What is the largest vertical force that can be exerted on the front edge of the rim before the portable hoop begins to tip?
Problem 2. Consider the system shown in
Figure 1 with m,= 12.5 kg, m, = 20.0 kg. Object
m, is resting on the floor, and object m, is 4.00
m above the floor when it is released from rest.
The pulley axis is frictionless. The cord is light
does not stretch, and does not slip on the
pulley
a. What is the magnitude
%3D
%3D
the acceleration of the object.
b. Calculate the time interval
required for m, to hit the floor
stops in 1.5 s. What is the magnitude of the friction force on the disk?
49. A 200 g, 20-cm-diameter plastic disk is spun on an axle
through its center by an electric motor. What torque must the
motor supply to take the disk from 0 to 1800 rpm in 4.0 s?
Chapter 4 Solutions
College Physics: A Strategic Approach (3rd 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 - A carpenter wishes to tighten the heavy head of...Ch. 4 - Internal injuries in vehicular acci-dents may be...Ch. 4 - Heres a great everyday use of the physics...Ch. 4 - Suppose you are an astronaut in deep space, far...Ch. 4 - Jonathan accelerates away from a stop sign. His...Ch. 4 - Normally, jet engines push air out the back of the...
Ch. 4 - If you are standing still, the upward normal force...Ch. 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 - Alyssa pushes to the right on a filing cabinet;...Ch. 4 - A very smart three-year-old child is given a wagon...Ch. 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 - A person is pushing horizontally on a box with a...Ch. 4 - As shown in the chapter, scallops use jet...Ch. 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 - A mountain climber is hanging from a vertical...Ch. 4 - You look up from your textbook and observe a...Ch. 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 - A constant force is applied to an object, causing...Ch. 4 - A constant force is applied to an object, causing...Ch. 4 - A man pulling an empty wagon causes it to...Ch. 4 - A car has a maximum acceleration of 5.0 m/s2 What...Ch. 4 - Scallops eject water from their shells to provide...Ch. 4 - Figure P4.21 shows an objects...Ch. 4 - In t-ball, young players use a bat to hit a...Ch. 4 - Two children fight over a 200 g stuffed bear. The...Ch. 4 - A 1500 kg car is traveling along a straight road...Ch. 4 - The motion of a very massive object can be...Ch. 4 - Very small forces can have tremendous effects on...Ch. 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 - 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 - 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 - 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 - Redraw the motion diagram shown in Figure P4.43,...Ch. 4 - Redraw the motion diagram shown in Figure P4.44,...Ch. 4 - Redraw the motion diagram shown in Figure P4.45,...Ch. 4 - Redraw the motion diagram shown in Figure P4.46,...Ch. 4 - A student draws the flawed free-body diagram shown...Ch. 4 - A student draws the flawed free-body diagram shown...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 - 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 - 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 - 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 - A rubber ball bounces. Wed like to understand how...Ch. 4 - If a car stops suddenly, you feel thrown forward....Ch. 4 - The fastest pitched baseball was clocked at 46...Ch. 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 - If your car is stuck in the mud and you don't have...Ch. 4 - If your car is stuck in the mud and you don't have...Ch. 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
A cars front suspension has a natural frequency of 0.45 Hz. The cars front shock absorbers are worn and no long...
Essential University Physics (3rd Edition)
(II) A 12-V battery has been connected to an LR circuit for sufficient time so that a steady current flows thro...
Physics for Scientists and Engineers with Modern Physics
What is the role of “loose” electrons in heat conductors?
Conceptual Physics (12th Edition)
The pV-diagram of the Carnot cycle.
Sears And Zemansky's University Physics With Modern Physics
13.37 The acceleration due to gravity at the north pole of Neptune is approximately 11.2 m/s2. Neptune has mass...
University Physics with Modern Physics (14th Edition)
Would two observers on either side of a rotating object agree on the direction of the angular velocity vector? ...
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
- In the Atwood machine shown below, ml = 2.00-kg and m2 = 5.60-kg. The masses of the pulley and string are negligible by comparison. The pulley turns without friction and the string does not stretch. The lighter object is released with a sharp push that sets it into motion at vi = 2.15 m/s downward. How long will it take for mị to reach the lowest level? m1 m2arrow_forwardTwo small cylindrical plastic containers with flat bottoms are placed on a turntable that has a smooth flat surface. Canister A is empty; canister B is full. Each canister is the same distance r from the center. The coefficient of static friction between the canisters and the turntable is µs. The speed of the turntable is gradually increased. Describe what will happen. Include which container will fall off first or if they will fall off at the same time.arrow_forwardA 1.5 kg block and a 2.5 kg block are attached to opposite ends of a light rope. The rope hangs over a solid, frictionless pulley that is 33 cm in diameter and has a mass of 0.75 kg. The pulley can be modeled as a cylinder. When the blocks are released, what is the acceleration of the lighter block? Express your answer in meters per second squared.arrow_forward
- a) What is the magnitude of the acceleration of each block? b) How much time would I take for the 4.3kg block to fall to the floor?arrow_forwardA 3500 kg flatbed truck is carrying an unsecured 400 kg box of wine glasses. The coefficient of static friction between the box and the truck bed is Usb=0.50, the coefficient of rolling friction between the truck's tires and the road is Urt=0.03. The truck comes to an unbanked curve in the road having a 40m radius. What is the maximum speed with which the truck can take the curve without damaging the wine glasses? Note that in order for the wine glasses to not be damaged, the box they're in should not slide on the truck bed and the truck itself should not slide on the road while taking the curve.arrow_forwardTwo friends are carrying a 500 N wooden slab along a 45 degrees stairway. The slab is 1.0 m long and 0.40 m high. They each apply vertical upward force (black arrows) on the bottom edges of the box in such a way that the box remains parallel to the stairs as shown in the figure. What are the magnitudes of theforces exerted by the lower and higher friend, respectively?arrow_forward
- A marble rolls down an incline at 27° from rest. a. What is its acceleration? a = 4.45 m/s² b. How far does it go in 3.3 s? Ax = 24.25 xmarrow_forwardWayne, Daryl, Katy Cat, Bonny, and Squirrely Dan are trying to finish their chores on the farm. They have to bring down a couple bags of cattle feed from the 2nd floor of their barn, to the bottom. To do this they will use a disc pulley to lower the two bags of cattle feed down. As a counter weight, they will use their friend Stewart. Stewart will start on the ground with the rope attached to him, and since Stewart has a lower mass than the two bags of cattle feed, when they put the cattle feed over the edge on the 2nd floor, the cattle feed will fall down, and Stewart will be raised up. Using the givens below, calculate how fast the bags of cattle feed will be falling the instant before they hit the ground. Mass of Stewart: 55 Kg Mass of the two bags of cattle feed: 70 Kg Height of the 2nd floor of the barn: 2.5m Radius of the disc pulley: 0.75m Mass of the disc pulley: 4 kg Acceleration of Gravity: 10arrow_forwardWe rest our calculator on a physics book; the surfaces have coefficients ?s = 0.45 and ?k = 0.25. a. To what angle do I need to tilt the book to make the calculator unstick and start sliding? b. Leaving our book ramp at this angle, what acceleration will the calculator experience?arrow_forward
- In the Atwood machine shown below, m, = 2.00 kg and m2 = 5.60 kg. The masses of the pulley and string are negligible by comparison. The pulley turns without friction and the string does not stretch. The lighter object is released with a sharp push that sets it into motion at v, = 2.15 m/s downward. How far will m, descend below %3D %3! its initial level? Pulley - String m, m, O A. None О В. 97.6 сm O C. 48.8 cm O D. 24.4 cm 12 2 cmarrow_forwardA. What is the tension in the lower cord? B. What is the speed of the block? V= m/sarrow_forwardYou are swinging a 0.25 kg water balloon vertically. The distance from your shoulder (acting as the center of rotation) and the water balloon is about 0.65 m. You estimate the water balloon is traveling at 7.0 m/s. At the very top of the circular path, how much force is your hand holding the water balloon? Enter absolute value. Hint: the water balloon is experiencing uniform circular motion.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
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