Question
Paul 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?
Answers
bobpursley
power=work/time=force*distance/time
= 245*.7/10 watts
= 245*.7/10 watts
OIJ
12
ljw
172