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1. Elaborate the possibility or impossibility of Archimedes' thoughts when he said, "Give me a place to stand, and I shall move the earth".

1. Elaborate the possibility or impossibility of Archimedes' thoughts when he said, "Give me a place to stand, and I shall move the earth".

College Physics
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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1. Elaborate the possibility or impossibility of Archimedes' thoughts when he said, "Give me a place to stand, and I shall move the earth".
Transcribed Image Text:1. Elaborate the possibility or impossibility of Archimedes' thoughts when he said, "Give me a place to stand, and I shall move the earth".
10. What will happen if an ice skater spinning on one foot extends her arms? A. Her moment of inertia and angular velocity will increase. B. Her moment of inertia and angular velocity will decrease. C. Her moment of inertia will decrease but her angular velocity will increase. D. Her moment of inertia will increase but her angular velocity will decrease. 11. Why should you not leave the top drawers of a heavy cabinet open while the others are closed? A. The center of mass becomes too high to be stable, so it would tip. B. The center of mass would extend in front of the cabinet, beyond the support base, so it would tip. C. The torque exerted by the gravitational force on the drawers decreases. D. It looks messy. 12. If all the earth's inhabitants moved to the equator, what would happen to the length of the day? A. The day would be longer. B. The day would be shorter. C. The length of the day would remain the same. D. There would be no day and night. 13. A force of 200 N acts tangentially on the rim of a when 30 cm in radius. (a) Find the torque. (b) Repeat if the force makes an angle of 40° to a spoke of the wheel. A. (a) 50 Nm (b) 32 Nm B. (a) 60 Nm (b) 39 Nm C. (a) 70 Nm (b) 46 Nm D. (a) 314 Nm (b) 3000 Nm 14. A certain coin and a wedding ring have exactly the same mass and radius. When placed at the top of an incline, which object reaches the bottom of the incline first? A. The coin B. The wedding ring C. The two objects reach the bottom at the same time. D. It depends, the denser one will reach the bottom first. 15. The Torque exerted on the moon by the gravitational pull of the earth is: A. Normal to the direction of the moon's path. B. Parallel to the direction of the moon's path C. Tangent to the imaginary line connecting the earth and the moon. D. Zero.
Transcribed Image Text:10. What will happen if an ice skater spinning on one foot extends her arms? A. Her moment of inertia and angular velocity will increase. B. Her moment of inertia and angular velocity will decrease. C. Her moment of inertia will decrease but her angular velocity will increase. D. Her moment of inertia will increase but her angular velocity will decrease. 11. Why should you not leave the top drawers of a heavy cabinet open while the others are closed? A. The center of mass becomes too high to be stable, so it would tip. B. The center of mass would extend in front of the cabinet, beyond the support base, so it would tip. C. The torque exerted by the gravitational force on the drawers decreases. D. It looks messy. 12. If all the earth's inhabitants moved to the equator, what would happen to the length of the day? A. The day would be longer. B. The day would be shorter. C. The length of the day would remain the same. D. There would be no day and night. 13. A force of 200 N acts tangentially on the rim of a when 30 cm in radius. (a) Find the torque. (b) Repeat if the force makes an angle of 40° to a spoke of the wheel. A. (a) 50 Nm (b) 32 Nm B. (a) 60 Nm (b) 39 Nm C. (a) 70 Nm (b) 46 Nm D. (a) 314 Nm (b) 3000 Nm 14. A certain coin and a wedding ring have exactly the same mass and radius. When placed at the top of an incline, which object reaches the bottom of the incline first? A. The coin B. The wedding ring C. The two objects reach the bottom at the same time. D. It depends, the denser one will reach the bottom first. 15. The Torque exerted on the moon by the gravitational pull of the earth is: A. Normal to the direction of the moon's path. B. Parallel to the direction of the moon's path C. Tangent to the imaginary line connecting the earth and the moon. D. Zero.
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