Concept explainers
The ramp used by person I in order to do least amount of work.
Answer to Problem 88A
Person I can choose any one of the two ramps as the work done by person I in moving the piano using the ramp 1 and ramp 2 are equal.
Explanation of Solution
Given:
The height of the platform is
Consider there are two ramp and person I can use one of these.
The length of the ramp 1 is
The length of the ramp 2 is
Consider the angle made by the ramp 1 with the horizontal is denoted by
Consider the angle made by the ramp 2 with the horizontal is denoted by
Formula used:
Consider an object is moved up the ramp, then the work done
Here,
Calculation:
The two ramps are shown in Figure below.
Consider the work done by person I in moving the piano by using ramp is denoted by
The work done
Consider the work done by person I in moving the piano by using ramp is denoted by
The work done
Compare the work done
Conclusion:
Thus, person I can choose any one of the two ramps.
Chapter 10 Solutions
Glencoe Physics: Principles and Problems, Student Edition
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