select the correct answer. carter pushes a bag full of basketball jerseys across the gym floor. then he…

select the correct answer. carter pushes a bag full of basketball jerseys across the gym floor. then he pushes with a constant force of 21 newtons. if he pushes the bag 9 meters in 3 seconds, how much power does he use? (hint: 1 watt = 1 $\frac{ncdot m}{s}$.) a. 3 watts b. 7 watts c. 27 watts d. 63 watts e. 189 watts

select the correct answer. carter pushes a bag full of basketball jerseys across the gym floor. then he pushes with a constant force of 21 newtons. if he pushes the bag 9 meters in 3 seconds, how much power does he use? (hint: 1 watt = 1 $\frac{ncdot m}{s}$.) a. 3 watts b. 7 watts c. 27 watts d. 63 watts e. 189 watts

Answer

Explanation:

Step1: Calculate work done

Work (W = F\times d), where (F = 21\ N) and (d=9\ m). So (W=21\times9 = 189\ J).

Step2: Calculate power

Power (P=\frac{W}{t}), where (W = 189\ J) and (t = 3\ s). So (P=\frac{189}{3}=63\ W).

Answer:

D. 63 watts