Final answer:
To calculate the power expended when exerting a force of 1 N that moves a book 2m in 1 second, you multiply the force by the distance to find the work done (2 J), and then divide by the time to find the power, which results in 2 Watts.
Step-by-step explanation:
The question deals with the concept of power, which in Physics is defined as the rate of doing work or transferring energy over time. When you exert a force of 1 Newton (N) to move a book 2 meters (m) in a time interval of 1 second (s), the work done on the book is found by multiplying the force by the distance (W = Fd). Since 1 N of force applied over 1 m of distance equals 1 joule (J) of work, a force of 1 N moving something 2 m amounts to 2 J of work. To find the power, we divide the work done by the time over which it was done. So, for this question:
Power (P) = Work (W) / Time (t) = (1 N × 2 m) / 1 s = 2 J / 1 s = 2 Watts