select the correct answer.\npaul lifts a sack weighing 245 newtons vertically from the ground and places it…

select the correct answer.\npaul lifts a sack weighing 245 newtons vertically from the ground and places it on a platform at a height of 0.7 meters. if he takes 10 seconds to do this task, what power has he expended during this time?\na. 10 watts\nb. 17.15 watts\nc. 23.6 watts\nd. 29.8 watts

select the correct answer.\npaul lifts a sack weighing 245 newtons vertically from the ground and places it on a platform at a height of 0.7 meters. if he takes 10 seconds to do this task, what power has he expended during this time?\na. 10 watts\nb. 17.15 watts\nc. 23.6 watts\nd. 29.8 watts

Answer

Explanation:

Step1: Calculate work done

Work (W = F\times d), where (F = 245) N and (d=0.7) m. So (W=245\times0.7 = 171.5) J.

Step2: Calculate power

Power (P=\frac{W}{t}), with (W = 171.5) J and (t = 10) s. So (P=\frac{171.5}{10}=17.15) W.

Answer:

B. 17.15 watts