Physics of Everyday Phenomena
9th Edition
ISBN: 9781259894008
Author: W. Thomas Griffith, Juliet Brosing Professor
Publisher: McGraw-Hill Education
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 4, Problem 8CQ
Two equal-magnitude horizontal forces act on a box as shown in the diagram. Is the object accelerated horizontally? Explain.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
A car rounds a bend in the road that has a
radius of 73 m. Rather than being banked
inward (toward the centre of the curve), the
road is banked outward, at an angle of 15°.
The coefficient of static friction between the
tires and the road is 0.76.
a) Draw a FBD diagram of the car, as viewed
from behind. Use a coordinate system that is
horizontal/vertical (i.e., not rotated).
b) Find the maximum speed that the car can
go around the bend without sliding off the
road.
QUESTION 1
A
B
U
A biker + bike of combined bike + person mass 63.7 kg wants to perform a particular stunt.
They will start at (A), travel up the ramp (B), and across (C), before launching and landing.
The biker will leave (C), 4.47 m above the ground, perfectly horizontally.
The biker must clear some water that stretches 6.52 m forward from the base of (C).
See the diagram for the path the biker must take.
The biker will not pedal past (A), so the kinetic energy at (A) is all they have.
Friction is negligible, so mechanical energy is conserved.
Calculate the minimum amount of kinetic energy needed at (A) so that the biker just passes the
water.
Four Forces
Force
Direction
1-component
y-component
INT
()
60°
160°
260°
325
R+ F.
F = mg
g = 9.80 m/s?
R = Resultant Force = F1 + F2 + F3
m1 = 0.155 kg,
m2 = 0.205 kg,
m3 = 0.105 kg,
m4 = 0.167 kg
%3D
%3D
Analysis
1. Calculate the magnitude of these forces (F1, F2, F3, F4, R) in newtons and
their x/y components. Record these values on your data sheet.
2. In this system, what was R + Fa? What should this sum be? Why?
Chapter 4 Solutions
Physics of Everyday Phenomena
Ch. 4 - Did Galileos work on motion precede in time that...Ch. 4 - Why did Aristotle believe that heavier objects...Ch. 4 - Aristotle believed that a force was necessary to...Ch. 4 - How did Aristotle explain the continued motion of...Ch. 4 - Did Galileo develop a more complete theory of...Ch. 4 - Two equal forces act on two different objects, one...Ch. 4 - A 3-kg block is observed to accelerate at a rate...Ch. 4 - Two equal-magnitude horizontal forces act on a box...Ch. 4 - Is it possible for the final temperature of the...Ch. 4 - Suppose that a bullet is fired from a rifle in...
Ch. 4 - Two equal forces act on an object in the...Ch. 4 - An object moving horizontally across a table is...Ch. 4 - A car goes around a curve traveling at constant...Ch. 4 - Is Newtons first law of motion explained by the...Ch. 4 - Is the mass of an object the same thing as its...Ch. 4 - The gravitational force acting on a lead ball is...Ch. 4 - The acceleration due to gravity on the moon is...Ch. 4 - Is mass a force? Explain.Ch. 4 - Two identical cans, one filled with lead shot and...Ch. 4 - A boy sits at rest on the floor. What two vertical...Ch. 4 - The engine of a car is part of the car and cannot...Ch. 4 - It is difficult to stop a car on an icy road...Ch. 4 - A ball hangs from a string attached to the...Ch. 4 - Would the tablecloth trick (see everyday...Ch. 4 - When a magician performs the tablecloth trick (see...Ch. 4 - A sprinter accelerates at the beginning of a...Ch. 4 - A mule is attempting to move a cart loaded with...Ch. 4 - The upward normal force exerted by the floor on a...Ch. 4 - A toy battery-powered tractor pushes a book across...Ch. 4 - If you get into an elevator on the top floor of a...Ch. 4 - If the elevator cable breaks and you find yourself...Ch. 4 - Two masses, m1 and m2, connected by a string, are...Ch. 4 - Two blocks with the same mass are connected by a...Ch. 4 - Suppose that a skydiver wears a specially...Ch. 4 - Prob. 35CQCh. 4 - Prob. 36CQCh. 4 - A single force of 42 N acts upon a 6-kg block....Ch. 4 - A heavy ball with a mass of 4.5 kg is observed to...Ch. 4 - A net force of 32 N acting on a wooden block...Ch. 4 - A 4.0-kg block being pulled across a table by a...Ch. 4 - A pulled tablecloth exerts a frictional force of...Ch. 4 - A 5-kg block being pushed across a table by a...Ch. 4 - Two forces, one of 70 N and the other of 30 N, act...Ch. 4 - A 5-kg block is acted upon by three horizontal...Ch. 4 - A 9-kg sled sliding freely on an icy surface...Ch. 4 - What is the weight of a 45-kg mass?Ch. 4 - What is the mass of a 735-N weight?Ch. 4 - Patricia has a weight of 125 lb. a. What is her...Ch. 4 - One of the authors of this text has a weight of...Ch. 4 - Who has the larger mass, a woman weighing 160 lb...Ch. 4 - At a given instant in time, a 6-kg rock that has...Ch. 4 - At a given instant in time, a 12-kg rock is...Ch. 4 - A 0.8-kg book rests on a table. A downward force...Ch. 4 - An upward force of 32.6 N is applied via a string...Ch. 4 - A 75-kg woman in an elevator is accelerating...Ch. 4 - A constant horizontal force of 28 N is exerted by...Ch. 4 - A rope exerts a constant horizontal force of 350 N...Ch. 4 - A dish with a mass of 0.3 kg has a force of...Ch. 4 - A 60-kg crate is lowered from a loading dock to...Ch. 4 - Two blocks tied together by a horizontal string...Ch. 4 - A 85-kg man is in an elevator that is accelerating...Ch. 4 - A skydiver has a weight of 850 N. Suppose that the...
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
- Is the acceleration due to gravity always negative or positive or it depends? Please explain in an easy to understand way.arrow_forwarda) What effect does horizontal velocity have on time of flight for a particle undergoing projectile motion over level ground with no drag? Explain. b) Two cars that are otherwise identical except that one has twice the mass of the other drive side by side and begin to brake at the same instant. Both cars come to rest having stopped with the friction force alone. Which car requires a greater distance to stop? Explain.arrow_forwardMultiple Correct: A child whirls a ball at the end of a rope, in a uniform circular motion. Which of the following statements is true? Select two answers. A.The velocity of the ball is constant B.The net force on the ball is directed outwards C.The magnitude of the ball's acceleration is constant D.The speed of the ball is constantarrow_forward
- + Blocks of mass m₁ and m₂ are connected by a massless string that passes over the pulley in the figure (Figure 1). The pulley turns on frictionless bearings, and mass m₁ slides on a horizontal, frictionless surface. Mass m₂ is released while the blocks are at rest Figure m₁ m₂ < 1 of 1 Assume the pulley is massless. Find the acceleration of m₁. Express your answer in terms of some or all of the variables m₁, m2, and constant g. 19] ΑΣΦ) a₁ = 0.684m₁ Submit Previous Answers Request Answer Part B X Incorrect; Try Again; One attempt remaining d 17 ΑΣΦ ? Find the tension in the string. Express your answer in terms of some or all of the variables m₁, m2, and constant g. P Pearson ?arrow_forwardA rocket drifts sideways in outer space from point "a" to point "b" as shown below. The rocket is subject to no outside forces. Starting at position "b", the rocket's engine is turned on and produces a constant thrust (force on the rocket) at right angles to the line "ab". The constant thrust is maintained until the rocket reaches a point "c" in space. 1) At point "c" the rocket's engine is turned off and the thrust immediately drops to zero. Which of the paths below will the rocket follow beyond point "c"? A B C D E 2) Beyond position "c" the speed of the rocket is: constant continuously increasing. continuously decreasing. increasing for a while and constant thereafter. constant for a while and decreasing thereafter.arrow_forwardAn antelope is being pulled by two forces whose vector-component expressions are: F1 = -2Ni + 4.8Nj + -3.6Nk F2 = 6.5Ni + 2.2Nj + 8.3Nk %3D What is the angle (in degrees) between these two vectors?arrow_forward
- 9b. Consider the motion of a ball thrown vertically upward. Use a vertical y-axis with the positive direction pointing up. Ignore the air resistance. Draw a force diagram for the ball on its way up. Draw the vectors starting at the black dot. The location and orientation of the vectors will be graded. The length of the vectors will not be graded.arrow_forwarda. Can the normal force on an object be directed horizontally? If not, why not? If so, provide an example.b. Can the normal force on an object be directed downward?If not, why not? If so, provide an example.arrow_forwardA 0.50-kg ball that is tied to the end of a 1.5m light cord is revolved in a horizontal plane, with the cord making a 30° angle with the vertical. a.) Determine the ball's speedarrow_forward
- A stuntman drives a car of mass 1125 kg east with a speed of 20 m/s. a. If the car accelerates at a rate of –2 m/s 2 , how long will it take the car to go 50 m? b. The stuntman drives the car off an 80 m cliff while going 15 m/s. How long will it take the car to land? c. How far horizontally from the cliff will the car land?arrow_forwardIf the angle of inclination from where we release the glider increases from 0=3° to 0=40°, which of the following statements is true? O The gravitational acceleration acting on the glider will double. O The gravitational acceleration acting on the glider will remain the same. O The gravitational acceleration acting on the glider will decrease 4 times. O The gravitational acceleration acting on the glider will decrease. O The gravitational acceleration acting on the glider will increase.arrow_forwardAccelerating object MUST be changing their velocity- either the magnitude or the direction of the velocity. Select one: O True O False The purpose of using the air pump was to reduce the gravitational acceleration acting on the glider. Select one: O True O Falsearrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Physics for Scientists and Engineers with Modern ...PhysicsISBN:9781337553292Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
Physics for Scientists and EngineersPhysicsISBN:9781337553278Author: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 TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
College PhysicsPhysicsISBN:9781285737027Author:Raymond A. Serway, Chris VuillePublisher:Cengage Learning
Physics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.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
Physics
ISBN:9781337553278
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
Principles of Physics: A Calculus-Based Text
Physics
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
College Physics
Physics
ISBN:9781285737027
Author:Raymond A. Serway, Chris Vuille
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