A bucket begins weighing 15 pounds, including the sand it holds. The bucket is to be lifted to the top of a 50 foot

Question

tall building by a rope of negligible weight. However, the bucket has a hole in it, and leaks 0.1 pounds of sand
each foot it is lifted. Find the work done lifting the bucket to the top of the building.

Answer 1

weight at top = 15 -.1*50
= 10
average weight = (15+10)/2 = 12.5

12.5 * 50 = 625 ft pounds

Answer 2

Thanks sir