A man lifts a 20.0-kg bucket of concrete from the ground up to the top of a 30.0-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.
How much work was done by the man in lifting the bucket? A)
5.88 kJ
B)
600 J
C)
760 J
D)
6.04 kJ
E)
160 J
Question 2
What is the conversion factor between km/ h2 and m/ s2?
A)
7.72 10-5 (m/ s2)/(km/ h2 )
B)
2.78 10-1 (m/ s2)/(km/ h2 )
C)
1.30 104 (m/ s2)/(km/ h2 )
D)
3.60 (m/ s2)/(km/ h2 )
E)
16.7 (m/ s2)/(km/ h2 )
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Louis H. Sullivan, Bayard-Condict Building, New York.