+|xBing jie xpaf. ArSC:/Users/HP/Documents/uSjuo/Chapter%2007 %20Homework%20soluti= تمي يزSolutiona. 2.6 kJ; b. 640J54. A 5.0-kg box has an acceleration of 2.0 m/s when it is pulled by a horizontal force across asurface 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?Solutiona. 3.5 J; b. - 2.5 J; c. 1.0 J; d. 1.O J60. A 2.0-kg block starts with a speed of 10 m/s at the bottom of a plane inclined at 37° to thehorizontál. The coefficient of sliding friction between the block and plane is 4; = 0.30. (a) Usethe work-energy principle to determine how far the block slides along the plane beforemomentarily coming to rest. (b) After stopping, the block slides back down the plane. What is itsspeed when it reaches the bottom? (Hint: For the round trip, only the force of friction does workon the block.)Solutiona. 6.06 m; b. 6.56 m/s62. 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172$4&3.VER.T3 19

Answered: Image /qna-images/answer/07419404-56cf-427c-b7ef-55947a6c0b9a.jpg

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

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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Concept explainers

Basic Terminology in Mechanics

The area of science and mathematics concerned the motion of the objects, the relation between the force matter, and motion if specified. Forces exerted over the objects result in displacements or changes in the position of an object concerning its environment. This branch of physics keeps its roots in Ancient Greece in the form of the scripts of Aristotle and Archimedes.

Question

+|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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