Concept explainers
(a)
The reading of the scale when the elevator is ascending with the speed of
(a)
Answer to Problem 65P
The reading indicated by the scale is
Explanation of Solution
Given:
The mass of the block is
Formula used:
The expression for the weight of the block is given by,
As the object is ascending at a constant speed, thus the reading of scale will be equal to the tension in the string and the expression for the tension of the string is given by,
Calculation:
The weight of the block is calculated as,
The tension of the string is calculated as,
Conclusion:
Therefore, the reading indicated by the scale is
(b)
The reading of the scale when the elevator is descending with the speed of
(b)
Answer to Problem 65P
The reading indicated by the scale is
Explanation of Solution
Given:
The mass of the block is
Formula used:
The expression for the weight of the block is given by,
As the object is descending at a constant speed, thus the reading of scale will be equal to the tension in the string and the expression for the tension of the string is given by,
Calculation:
The weight of the block is calculated as,
The tension of the string is calculated as,
Conclusion:
Therefore, the reading indicated by the scale is
(c)
The reading of the scale when the elevator is ascending with the speed of
(c)
Answer to Problem 65P
The reading indicated by the scale is
Explanation of Solution
Given:
The mass of the block is
Formula used:
Consider the upward acceleration of the block is
The expression for the reading of the scale is given by,
Calculation:
The value of the reading of the scale is calculated as,
Conclusion:
Therefore, the reading indicated by the scale is
(d)
The reading of the scale for the time interval
(d)
Answer to Problem 65P
The reading indicated by the scale for different time interval is
Explanation of Solution
Given:
The mass of the block is
Formula used:
The expression for the reading of the elevator during the first
The block comes to rest in
The reading of the scale will be equal to the tension in the string and the expression for the tension in the string is given by,
Calculation:
The value of the reading of the scale during the first
The acceleration of the block after
The reading of the scale is calculated as,
Thus, the reading of the scale for different time interval is given by,
Conclusion:
Therefore, the reading indicated by the scale for different time interval is
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Chapter 4 Solutions
Physics for Scientists and Engineers, Vol. 3
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- Principles of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning