Concept explainers
(a)
The sprinter’s average power for the race.
(a)
Answer to Problem 95A
The sprinter’s average power for the race is
Explanation of Solution
Given:
The mass of sprinter is
The displacement is
The time period is
Formula used:
The expression for the work done is
Here,
The expression for the power is
Here,
The expression for the acceleration in case of zero initial velocity is
Calculation:
The acceleration of the sprinter as follows:
The sprinter’s average power for the race as follows:
Conclusion:
Therefore, the sprinter’s average power for the race is
(b)
The maximum power developed by the sprinter.
(b)
Answer to Problem 95A
The maximum power developed by the sprinter is
Explanation of Solution
Given:
The mass of sprinter is
The displacement is
The time period is
Formula used:
The power is
Calculation:
From part (a), the sprinter’s average power for the race is
The power increases linearly from zero.
The maximum power developed by the sprinter as follows:
Conclusion:
Thus, the maximum power developed by the sprinter is
Chapter 10 Solutions
Glencoe Physics: Principles and Problems, Student Edition
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