Question

1. if it takes you 30 seconds to move a chair 20 meters across the floor, using a force of 5 newtons, how much power did you put out? 3000 joules per second 3.33 joules per second 52 joules per second 120 joules per second

Explanation:

Step1: Calculate work done

Work \(W = F\times d\), where \(F = 5\ N\) and \(d=20\ m\). So \(W=5\times20 = 100\ J\).

Step2: Calculate power

Power \(P=\frac{W}{t}\), with \(W = 100\ J\) and \(t = 30\ s\). Then \(P=\frac{100}{30}\approx3.33\ J/s\).

Answer:

B. 3.33 joules per second