Concept explainers
Calculate the watts of power expended when a force of 1 N moves a book 2 m in a time interval of 1 s.
Power in watts.
Answer to Problem 36A
Power is equal to,
Explanation of Solution
Given :
Force is given,
Distance moved by applying force,
Time interval is given,
Formula used :
Where, W is work done, F is force and s is distance.
Where, W is work done, P is power and t is time.
Calculation :
Now, substituting the value of F and s in equation (1) and solve.
Now, substituting the value of W and t in equation (2) and solve.
Conclusion :
Therefore, power will be equal to 2 W.
Chapter 9 Solutions
Conceptual Physics: The High School Physics Program
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