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1.) An ice skater begins to rotatc on the ice-rink at a ratc of 40 rpm with their legs and arms somewhat extended. They pull their arms and legs in, tucking them close to their torso. As this occurs, their speed increases to 65 rpm. What is the ratio of their moments of inertia after they pulled their limbs in compared to before (i.e. lafter/before A) 0.379 B) 0.615 C) I D) 1.625 E) 2.641 2.) The figure to the right shows a light plastic cart and a heavy steel cart that are both pushed with the same force. Both carts initially are at rest when the force is applied to both carts for 1.0 second. After the force is removed, what quantity is the same for both carts? A) Final kinetic energy B) Final velocity C) Final linear momentum D) Final moment of inertia E) Final gravitational potential energy 3.) Just as in the last problem, the figure to the right shows a light plastic cart and a heavy steel cart that are both pushed with the same force. Both carts initially are at rest when the force is applied to both carts, this time for a distance of 1.0 meter. After the force is removed, what quantity is the same for both carts? A) Final kinetic energy B) Final velocity C) Final linear momentum D) Final moment of inertia E) Final gravitational potential energy トト

1.) An ice skater begins to rotatc on the ice-rink at a ratc of 40 rpm with their legs and arms somewhat extended. They pull their arms and legs in, tucking them close to their torso. As this occurs, their speed increases to 65 rpm. What is the ratio of their moments of inertia after they pulled their limbs in compared to before (i.e. lafter/before A) 0.379 B) 0.615 C) I D) 1.625 E) 2.641 2.) The figure to the right shows a light plastic cart and a heavy steel cart that are both pushed with the same force. Both carts initially are at rest when the force is applied to both carts for 1.0 second. After the force is removed, what quantity is the same for both carts? A) Final kinetic energy B) Final velocity C) Final linear momentum D) Final moment of inertia E) Final gravitational potential energy 3.) Just as in the last problem, the figure to the right shows a light plastic cart and a heavy steel cart that are both pushed with the same force. Both carts initially are at rest when the force is applied to both carts, this time for a distance of 1.0 meter. After the force is removed, what quantity is the same for both carts? A) Final kinetic energy B) Final velocity C) Final linear momentum D) Final moment of inertia E) Final gravitational potential energy トト

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.) An ice skater begins to rotate on the ice-rink at a rate of 40 rpm with their legs and arms somewhat extended. They pull their arms and legs in, tucking them close to their torso. As this occurs, their speed increases to 65 rpm. What is the ratio of their moments of inertia after they pulled their limbs in compared to before (i.e. lafter/'before)? A) 0.379 B) 0.615 C) 1 D) 1.625 E) 2.641 2.) The figure to the right shows a light plastic cart and a heavy steel cart that are both pushed with the same force. Both carts initially are at rest when the force is applied to both carts for 1.0 second. After the force is removed, what quantity is the same for both carts? A) Final kinetic energy B) Final velocity C) Final linear momentum D) Final moment of inertia E) Final gravitational potential energy 3.) Just as in the last problem, the figure to the right shows a light plastic cart and a heavy steel cart that are both pushed with the same force. Both carts initially are at rest when the force is applied to both carts, this time for a distance of 1.0 meter. After the force is removed, what quantity is the same for both carts? A) Final kinetic energy B) Final velocity C) Final linear momentum D) Final moment of inertia E) Final gravitational potential energy
Transcribed Image Text:1.) An ice skater begins to rotate on the ice-rink at a rate of 40 rpm with their legs and arms somewhat extended. They pull their arms and legs in, tucking them close to their torso. As this occurs, their speed increases to 65 rpm. What is the ratio of their moments of inertia after they pulled their limbs in compared to before (i.e. lafter/'before)? A) 0.379 B) 0.615 C) 1 D) 1.625 E) 2.641 2.) The figure to the right shows a light plastic cart and a heavy steel cart that are both pushed with the same force. Both carts initially are at rest when the force is applied to both carts for 1.0 second. After the force is removed, what quantity is the same for both carts? A) Final kinetic energy B) Final velocity C) Final linear momentum D) Final moment of inertia E) Final gravitational potential energy 3.) Just as in the last problem, the figure to the right shows a light plastic cart and a heavy steel cart that are both pushed with the same force. Both carts initially are at rest when the force is applied to both carts, this time for a distance of 1.0 meter. After the force is removed, what quantity is the same for both carts? A) Final kinetic energy B) Final velocity C) Final linear momentum D) Final moment of inertia E) Final gravitational potential energy
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