Conceptual Physical Science (6th Edition)
6th Edition
ISBN: 9780134060491
Author: Paul G. Hewitt, John A. Suchocki, Leslie A. Hewitt
Publisher: PEARSON
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Textbook Question
Chapter 1, Problem 83E
In Figure 1.15 we see Marie pushing horizontally on a table that slides across the floor at constant velocity. If she pushed with the same amount of force, but directed that force downward a bit, how would the amount of friction of the table legs with the floor be affected? Defend your answer.
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Consider the figure on the left, in which two blocks are being pushed across a frictionless surface. The blocks have masses m1 = 3kg and m2 = 15kg.(a) How hard are you pushing on m1, if the acceleration of m2 is 6m/s2? (You are pushing horizontally, as shown in the figure.)
(b) What is the contact force between m1 and m2? (Still focusing on the figure on the left.)
(c) Now consider the figure on the right, in which m2 is lifted off the ground. If the coefficient of static friction between m1 and m2 is 0.2 how hard would you have to push the blocks to ensure m2 would not slide down m1?
A person pushes on a stationary 125 N box with a force of 75 N at 30∘ below the horizontal, as shown in the figure. (Figure 1) The coefficient of static friction between the box and the horizontal floor is 0.84.
What is the normal force on the box?
What is the friction force on the box?
What is the largest the friction force could be?
The person now replaces his push with a 75 N pull at 30∘ above the horizontal. Find the normal force on the box in this case.
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Chapter 1 Solutions
Conceptual Physical Science (6th Edition)
Ch. 1 - Aristotle on Motion 1. What did Aristotle believe...Ch. 1 - Did Aristotle believe that forces are necessary to...Ch. 1 - Galileos Concept of Inertia 3. What idea of...Ch. 1 - Which dominated Galileos way of extending...Ch. 1 - What name is given to the property by which...Ch. 1 - MassA Measure of Inertia 6. Which depends on...Ch. 1 - Where is your weight greater, on Earth or on the...Ch. 1 - What are the unit of measurement for weight and...Ch. 1 - A 1-kg object weight nearly 10 N on Earth. Would...Ch. 1 - Net Force 10. What is the net force on a box that...
Ch. 1 - What two properties are necessary for a vector...Ch. 1 - The Equilibrium Rule 12. Name the force that...Ch. 1 - How much tension is in a vertical rope that holds...Ch. 1 - Prob. 14RCQCh. 1 - One bowling ball sits at rest, and another bowling...Ch. 1 - Support Force 16. Why is the support force on an...Ch. 1 - When you weigh yourself, how does the support...Ch. 1 - The Force of Friction 18. How does the direction...Ch. 1 - If you push to the right on a heavy piece of...Ch. 1 - Suppose you push to the right on a heavy piece of...Ch. 1 - If you push a heavy piece of furniture and it...Ch. 1 - Speed and Velocity 22. Distinguish between speed...Ch. 1 - Why do we say that velocity is a vector and speed...Ch. 1 - Does the speedometer on a vehicle show average...Ch. 1 - How can you be both at rest and moving at 100,000...Ch. 1 - Acceleration 26. Distinguish between velocity and...Ch. 1 - What is the acceleration of an object that moves...Ch. 1 - What is the acceleration of an object in free fall...Ch. 1 - Show that the average speed of a rabbit that runs...Ch. 1 - Calculate your average walking speed when you step...Ch. 1 - Show that the acceleration of a car that can go...Ch. 1 - Show that the acceleration of a hamster is 5 m/s2...Ch. 1 - Show that the hamster in Exercise 37 travels a...Ch. 1 - Show that a freely falling rock drops a distance...Ch. 1 - Find the strength of the net force produced by a...Ch. 1 - Lucy Lightfoot stands with one foot on one...Ch. 1 - Henry Heavyweight weighs 1200 N and stands on a...Ch. 1 - The sketch shows a painters scaffold in mechanical...Ch. 1 - A different scaffold that weighs 400 N supports...Ch. 1 - A horizontal force of 120 N is required to push a...Ch. 1 - Driving along the toad at 88 km/h, Reckless Rick...Ch. 1 - An airplane with an airspeed of 90 km/h lands on a...Ch. 1 - (a) Show that the average speed of a tennis ball...Ch. 1 - (a) Show that Leslies average speed is 10 km/h...Ch. 1 - (a) Show that the acceleration is 7.5 m/s2 for a...Ch. 1 - Lillian rides her bicycle along a straight road at...Ch. 1 - Extend Table 1.2 (which gives values from 0 to 5...Ch. 1 - A car races on a circular track of radius r. (a)...Ch. 1 - A ball is thrown straight up with an animal speed...Ch. 1 - A ball is thrown straight up with enough speed so...Ch. 1 - A school bus slows to a stop with an average...Ch. 1 - An airplane starting from rest, at one end of a...Ch. 1 - The weights of Burl, Paul and the scaffold produce...Ch. 1 - Rank, from greatest to least, the net force on the...Ch. 1 - Different materials. A, B, C, and D, rest on a...Ch. 1 - Three pucks, A, B, and C, are sliding across ice...Ch. 1 - EXERCISES (SYNTHESIS) 1.1. Aristotle on Motion 62....Ch. 1 - Which of Aristotle's ideas did Galileo discredit...Ch. 1 - Galileo's Concept of Inertia 64. A bawling ball...Ch. 1 - A space probe is carried by a rocket into outer...Ch. 1 - When a ball rolls down an incline, it gains speed...Ch. 1 - MassA Measure of Inertia 67. What physical...Ch. 1 - Which has more mass: a 2-kg fluffy pillow or a...Ch. 1 - Is a person on a diet more accurately said to lose...Ch. 1 - Personally, what is your mass in kilograms? Your...Ch. 1 - Gravitational force on the Moon is merely 1/6 the...Ch. 1 - Net Force 72. A monkey harp stationary at the end...Ch. 1 - Suppose the monkey weighs 100 N and the vine...Ch. 1 - If the vine that supports the monkey breaks, what...Ch. 1 - The Equilibrium Rule 75. Can an object be in...Ch. 1 - When you push downward on a book that it at rest...Ch. 1 - Nellie Newton hangs at rest from the ends of the...Ch. 1 - A hockey puck at rest is in equilibrium. Is it in...Ch. 1 - Support Force 79. An empty jug of weight W is at...Ch. 1 - Place a heavy book on a table, and the table...Ch. 1 - The Force of Friction 81. In order to slide a...Ch. 1 - Consider your desk at rest on your bedroom floor....Ch. 1 - In Figure 1.15 we see Marie pushing horizontally...Ch. 1 - Speed and Velocity 84. One ultralight aircraft...Ch. 1 - What is the impact speed when a car moving at 100...Ch. 1 - You're in a car traveling on a highway at some...Ch. 1 - Emily Easy go can paddle a canoe in still water at...Ch. 1 - Acceleration 88. Grade says acceleration is how...Ch. 1 - What is the acceleration of a Tesla automobile...Ch. 1 - What is the acceleration of a car that moves at a...Ch. 1 - Correct your friend who says, "Japan's bullet...Ch. 1 - Suppose that a freely falling object were somehow...Ch. 1 - Consider a freely falling object dropped from...Ch. 1 - Asteroids have been moving through space for...Ch. 1 - In answer to the question "What keeps Earth moving...Ch. 1 - Harry the painter swings year after year from his...Ch. 1 - For the pulley system shown, what is the upper...Ch. 1 - When the strong man in Exercise 97 exerts a...Ch. 1 - In tearing a paper towel or plastic bag from a...Ch. 1 - Someone standing at the edge of a cliff (as in...Ch. 1 - When a ball is tossed straight up, it momentarily...Ch. 1 - Suppose that a freely falling object falls from a...Ch. 1 - In the absence of air resistance, a ballplayer...Ch. 1 - On which of these hills does the ball roll down...Ch. 1 - Because Earth routes once every 24 hours, the west...Ch. 1 - If you toss a coin straight upward while riding in...Ch. 1 - Two balls, A and B, are released simultaneously...Ch. 1 - Refer to the tracks in Exercise 107. (a) Does ball...Ch. 1 - Choose the BEST way to complete the statement. 1....Ch. 1 - According to Galileo, inertia is a (a) force like...Ch. 1 - When a 10-kg block is simultaneously pushed...Ch. 1 - Tension is actually a force that tends to (a)...Ch. 1 - The equilibrium rule, F = 0, applies to (a)...Ch. 1 - When you stand on two bathroom scales, one fool on...Ch. 1 - Your Average speed in skateboarding to your...Ch. 1 - If an object moves with constant acceleration, its...Ch. 1 - If a falling object gains 10 m/s each second it...Ch. 1 - A freely falling object his a speed of 30 m/s at...
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