A small block of mass 1.26 kg slides without friction on a horizontal table. Initially it moves in a circle of radius R = 0.6 m with a speed 1.5 m/s. It is held in its path by a string that passes through a small hole at the center of the circle. The string is then pulled down a distance of 0.12 m.( Ro - R = 0.12 m.) It is pulled so slowly that the object continues to move in a circle of continually decreasing radius. 1) While the string in pulling in the block, which of the following qualities of the block is conserved (circle all that are correct): a) Rotational kinetic energy b) Angular momentum c) Linear momentum d) Mechanical energy e) None of the above √2) What is the final linear speed of the block (in m/sec)? 1.8 m/sec. (3) How much work was done by the force that pulled on the string? 0.915

A small block of mass 1.26 kg slides without friction on a horizontal table. Initially it moves in a circle of radius R = 0.6 m with a speed 1.5 m/s. It is held in its path by a string that passes through a small hole at the center of the circle. The string is then pulled down a distance of 0.12 m.( Ro - R = 0.12 m.) It is pulled so slowly that the object continues to move in a circle of continually decreasing radius. 1) While the string in pulling in the block, which of the following qualities of the block is conserved (circle all that are correct): a) Rotational kinetic energy b) Angular momentum c) Linear momentum d) Mechanical energy e) None of the above √2) What is the final linear speed of the block (in m/sec)? 1.8 m/sec. (3) How much work was done by the force that pulled on the string? 0.915

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter9: Linear Momentum And Collisions

Section: Chapter Questions

Problem 9.1CYU: Check Your Understanding The U.S. Air Force uses “10gs” (an acceleration equal to 109.8m/s2 ) as the...

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