Question

Question 12 (3 points) saved A worker lifts a 20.0-kg bucket of concrete from the ground up to the top of a 21.0- m tall building. The bucket is initially at rest, but is traveling at 4.0 m/s when it reaches the top of the building. What is the minimum amount of work that the worker did in lifting the bucket? 342 599 ) 428) 4.28) 6850 kJ Dace 12 of 15

Answer 1

the buchat, ma 20 1 1 Given, mass of zoug height, h=21m; Initial velocity when at ground, e=0; final relreity when at top of building, v= 4 m/s. - 1 final energy, + Ş.K.A piſ nisha į mv --TCLX * 20x16) + ( 20% 9-8221) ] Jonas = 1607 416 24276 Joule = 9.28 kg. 2. pay E = 9:28 kg