A3. Two workers are moving a box of mass 70 kg across a surface with coefficient of static friction u, = 0.6, and kinetic F, %3D F2 friction u 0.32. Worker 1 pulls horizontally with F,= 150 N while Worker 2 pushes with F;= 280 N at a downward angle of 25°. %3D a) In the diagram, sketch in the other 3 forces in this problem. Use that as your free body diagram to set-up Newton's 2 Law in x- and y- directions b) Calculate fs.mas and compare it to the quantity F, + F, to show the box will move. c) Now use kinetic friction and calculate the acceleration of the box.

A3. Two workers are moving a box of mass 70 kg across a surface with coefficient of static friction u, = 0.6, and kinetic F, %3D F2 friction u 0.32. Worker 1 pulls horizontally with F,= 150 N while Worker 2 pushes with F;= 280 N at a downward angle of 25°. %3D a) In the diagram, sketch in the other 3 forces in this problem. Use that as your free body diagram to set-up Newton's 2 Law in x- and y- directions b) Calculate fs.mas and compare it to the quantity F, + F, to show the box will move. c) Now use kinetic friction and calculate the acceleration of the box.

University Physics Volume 1

18th Edition

ISBN:9781938168277

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

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

Chapter5: Newton's Law Of Motion

Section: Chapter Questions

Problem 95CP: On June 25, 1983, shot-putter Udo Beyer of East Germany threw the 7.26-kg shot 22.22 m, which at...

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On June 25, 1983, shot-putter Udo Beyer of East Germany threw the 7.26-kg shot 22.22 m, which at that time was a world record. (a) If the shot was released at a height of 2.20 m with a projection angle of 45.00, what was its initial velocity? (b) If while in Beyer’s hand the shot was accelerated uniformly over a distance of 1.20 m, what was the net force on it?
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