Concept explainers
a.
The ideal mechanical advantage of the given machine.
a.
Answer to Problem 28PP
Explanation of Solution
Given:
The radius of the crank,
The radius of the drum,
Number of revolutions undertaken by crank,
Formula used:
The idea mechanical advantage is the ratio of the distances moved,
Where
Calculation:
Using the given values in above formula, the ideal mechanical advantage of the given machine will be,
Conclusion:
Thus, the ideal mechanical advantage of the machine is
b.
The amount of force to be exerted on the handle of the crank to exert
b.
Answer to Problem 28PP
Explanation of Solution
Given:
The radius of the crank,
The radius of the drum,
Number of revolutions undertaken by crank,
The force needed on the rope,
The efficiency,
Formula used:
The efficiency of a machine is the ratio of real and idea mechanical advantages,
Where
Calculation:
Using the given values in above formula, the force to be exerted on the handle of the crank will be,
Conclusion:
Thus, the amount of force to be exerted on the handle of the crank is
Chapter 10 Solutions
Glencoe Physics: Principles and Problems, Student Edition
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