University Physics Volume 1
18th Edition
ISBN: 9781938168277
Author: William Moebs, Samuel J. Ling, Jeff Sanny
Publisher: OpenStax - Rice University
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Chapter 10, Problem 117AP
Two children push on opposite sides of a door during play. Both push horizontally and perpendicular to the door. One child pushes with a force of 17.5 N at a distance of 0.600 m from the hinges, and the second child pushes at a distance of 0.450 m. What force must the second child exert to keep the door from moving? Assume friction is negligible.
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Chapter 10 Solutions
University Physics Volume 1
Ch. 10 - Check Your Understanding The fan blades on a...Ch. 10 - Check Your Understanding A centrifuge used in DNA...Ch. 10 - Check Your Understanding A boy jumps on a...Ch. 10 - Check Your Understanding A nuclear submarine...Ch. 10 - Check Your Understanding What is the moment of...Ch. 10 - Check Your Understanding A large ocean-going ship...Ch. 10 - Check Your Understanding The fan blades on a jet...Ch. 10 - Check Your Understanding A constant torque of...Ch. 10 - A clock is mounted on the wall. As you look at it,...Ch. 10 - What is the value of the angular acceleration of...
Ch. 10 - A baseball bat is swung. Do all points on the bat...Ch. 10 - The blades of a blender on a counter are rotating...Ch. 10 - If a rigid body has a constant angular...Ch. 10 - If a rigid body has a constant angular...Ch. 10 - If the angular acceleration of a rigid body is...Ch. 10 - A massless tether with a masses tied to both ends...Ch. 10 - Explain why centripetal acceleration changes the...Ch. 10 - In circular motion, a tangential acceleration can...Ch. 10 - Suppose a piece of food is on the edge of a...Ch. 10 - What if another planet the same size as Earth were...Ch. 10 - A solid sphere is rotating about an axis through...Ch. 10 - If a child walks toward the center of a...Ch. 10 - A discus thrower rotates with a discus in his hand...Ch. 10 - Does increasing the number of blades on a...Ch. 10 - The moment of inertia of a long rod spun around an...Ch. 10 - Why is the moment of inertia of a hoop that has a...Ch. 10 - What three factors affect the torque created by a...Ch. 10 - Give an example in which a small force exerts a...Ch. 10 - When reducing the mass of a racing bike, the...Ch. 10 - Can a single force produce a zero torque?Ch. 10 - Can a set of forces have a net torque that is zero...Ch. 10 - Can a set of forces have a net force that is zero...Ch. 10 - Prob. 25CQCh. 10 - If you were to stop a spinning wheel with a...Ch. 10 - Prob. 27CQCh. 10 - Calculate the angular velocity of Earth.Ch. 10 - A track star runs a 400-m race on a 400-m circular...Ch. 10 - A wheel rotates at a constant rate of...Ch. 10 - A particle moves 3.0 m along a circle of radius...Ch. 10 - A compact disc rotates at 500 rev/min. If the...Ch. 10 - Unreasonable results. 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If its power...Ch. 10 - A clay cylinder of radius 20 cm on a potter’s...Ch. 10 - A uniform cylindrical grindstion has a mass of 10...Ch. 10 - A uniform disk of mass 500 kg and radius 0.25 m is...Ch. 10 - A propeller is accelerated from rest to an angular...Ch. 10 - A sphere of mass 1.0 kg and radius 0.5 m is...Ch. 10 - A uniform rod of length L and mass M is held...Ch. 10 - An athlete in a gym applies a constant force of 50...Ch. 10 - A 2-kg block on a frictionless inclined plane at...Ch. 10 - Small bodies of mass m1 and m2 are attached to...Ch. 10 - A cyclist is riding such that the wheels of the...Ch. 10 - Calculate the angular velocity of the orbital...Ch. 10 - A phonograph turntable rotating at 331/3rev/min...Ch. 10 - With the aid of a string, a gyroscope is...Ch. 10 - Suppose a piece of dust has fallen on a CD. If the...Ch. 10 - A system of point particles is rotating about a...Ch. 10 - Calculate the moment of inertia of a skater given...Ch. 10 - A stick of length 1.0 m and mass 6.0 kg is free to...Ch. 10 - A pendulum consists of a rod of length 2 m and...Ch. 10 - Calculate the torque of the 40-N force around the...Ch. 10 - Two children push on opposite sides of a door...Ch. 10 - Prob. 118APCh. 10 - An automobile engine can produce 200Nm of torque....Ch. 10 - A grindstone with a mass of 50 kg and radius 0.8 m...Ch. 10 - The angular acceleration of a rotating rigid body...Ch. 10 - Earth’s day has increased by 0.002 s in the last...Ch. 10 - A disk of mass m , radius R , and area A has a...Ch. 10 - Zorch, an archenemy of Rotation Man, decides to...Ch. 10 - A cord is wrapped around the rim of a solid...
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