Conceptual Physical Science Explorations
2nd Edition
ISBN: 9780321567918
Author: Paul G. Hewitt, Leslie A. Hewitt, John A Suchocki
Publisher: Addison Wesley
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Textbook Question
Chapter 2, Problem 9RAT
If you push your desk along the floor with a force of 80 N and it slides at constant speed, then the
(a) also 80 N in the direction of your push.
(b) 80 N in the direction opposite to your push.
(c) zero.
(d) None of these.
Expert Solution & Answer
To determine
The correct option for the statement "If you push your desk along the floor with a force of and it slides at constant speed, then the force of friction acting on the desk is".
Answer to Problem 9RAT
The correct option for the statement "If you push your desk along the floor with a force of and it slides at constant speed, then the force of friction acting on the desk is" is option (b).
Explanation of Solution
The force is required only to start the motion of an object, but after moving, force is only needed to overcome friction.
In a given condition, a desk after application of some force moves along the floor at a constant speed it means the resultant net force acting over the desk is zero in magnitude, and the force of friction offered by the floor is equal to the applied horizontal force but opposite in direction. If the magnitude of friction force and applied force varies, the velocity of the desk also varies. From this, it is concluded that option (b) will be correct in the given options.
Conclusion:
Therefore, the correct option for the statement "If you push your desk along the floor with a force of and it slides at constant speed, then the force of friction acting on the desk is" is option (b).
Chapter 2 Solutions
Conceptual Physical Science Explorations
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