posted by lisa .
in which of the following is the most work being done by roy and which example roy doing no work? a)roy lifts a 5kg radio up 1 meter b) roy holds a 5 kg radio at a height of 1meter for 3 hours. c)roy lifts a 10 kg TV up 1 meter d)roy lifts a 10 kg TV up 2 meters. e) roy drops a 10 kg TV from a height of 23 meters.
10 * 2 is max (d)
The 0 * 23 = 0 , no work by roy , (e)