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nataly862011 [7]
3 years ago
5

A 12-ft chain weighs 24 lb and hangs from a 10-ft high ceiling. Find the work needed to lift the lower end of the chain to the c

eiling so that it is level with the upper end
Mathematics
1 answer:
Naddika [18.5K]3 years ago
5 0

Answer:

Step-by-step explanation:

We shall calculate work needed by knowing the distance by which centre of mass has been raised in the process .

center of mass is raised by

( 10 / 2 - 6 / 2 ) =  2 ft

h = 2 ft

g = 32 ft/s²

m = 24 lb

Work done = mgh

= 24 x 32 x 2

= 1536 units.

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