Concept explainers
How much power is required to do 100 J of work on an object in a time of 0.5 s? How much power is required if the same work is done in 1 s?
The power required to do a given work on an object in a given time. Also power for a different time instant.
Answer to Problem 5A
The power required to do the given work in 0.5 s is
The power required to do the given work in 1 s is
Explanation of Solution
Given:
A work of 100 J is done on an object for a time of 0.5 s. Then a time duration of 1 s is considered
Formula used:
The power required to do work on an object is the work done per unit time, expressed as,
Calculation:
The work done is given as 100 J and the duration is 0.5 s. The power required is given as,
In the second case, the time considered is 1 s. The power corresponding to this duration is,
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