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54. A 5.0-kg box has an acceleration of 2.0 m/s when it is pulled by a horizontal force across a surface with H, = 0.50. Find the work done over a distance of 10 cm by (a) the horizontal force, (b) the frictional force, and (c) the net force. (d) What is the change in kinetic energy of the box? Solution %3D a. 3.5 J; b.-2.5 J; c. 1.0 J; d. 1.0J

54. A 5.0-kg box has an acceleration of 2.0 m/s when it is pulled by a horizontal force across a surface with H, = 0.50. Find the work done over a distance of 10 cm by (a) the horizontal force, (b) the frictional force, and (c) the net force. (d) What is the change in kinetic energy of the box? Solution %3D a. 3.5 J; b.-2.5 J; c. 1.0 J; d. 1.0J

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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+|x Bing jie x paf. ArS C:/Users/HP/Documents/uSjuo/Chapter%2007 %20Homework%20soluti = تمي يز Solution a. 2.6 kJ; b. 640J 54. A 5.0-kg box has an acceleration of 2.0 m/s when it is pulled by a horizontal force across a surface with Lu =0.50. Find the work done over a distance of 10 cm by (a) the horizontal force, (b) the frictional force, and (c) the net force. (d) What is the change in kinetic energy of the box? Solution a. 3.5 J; b. - 2.5 J; c. 1.0 J; d. 1.O J 60. A 2.0-kg block starts with a speed of 10 m/s at the bottom of a plane inclined at 37° to the horizontál. The coefficient of sliding friction between the block and plane is 4; = 0.30. (a) Use the work-energy principle to determine how far the block slides along the plane before momentarily coming to rest. (b) After stopping, the block slides back down the plane. What is its speed when it reaches the bottom? (Hint: For the round trip, only the force of friction does work on the block.) Solution a. 6.06 m; b. 6.56 m/s 62. A small block of mass 200 g starts at rest at A, slides to B where its speed is V, = 8.0 m/s, w 米 17 2$ 4 & 3. V E R. T 3 19
Transcribed Image Text:+|x Bing jie x paf. ArS C:/Users/HP/Documents/uSjuo/Chapter%2007 %20Homework%20soluti = تمي يز Solution a. 2.6 kJ; b. 640J 54. A 5.0-kg box has an acceleration of 2.0 m/s when it is pulled by a horizontal force across a surface with Lu =0.50. Find the work done over a distance of 10 cm by (a) the horizontal force, (b) the frictional force, and (c) the net force. (d) What is the change in kinetic energy of the box? Solution a. 3.5 J; b. - 2.5 J; c. 1.0 J; d. 1.O J 60. A 2.0-kg block starts with a speed of 10 m/s at the bottom of a plane inclined at 37° to the horizontál. The coefficient of sliding friction between the block and plane is 4; = 0.30. (a) Use the work-energy principle to determine how far the block slides along the plane before momentarily coming to rest. (b) After stopping, the block slides back down the plane. What is its speed when it reaches the bottom? (Hint: For the round trip, only the force of friction does work on the block.) Solution a. 6.06 m; b. 6.56 m/s 62. A small block of mass 200 g starts at rest at A, slides to B where its speed is V, = 8.0 m/s, w 米 17 2$ 4 & 3. V E R. T 3 19
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