Question
In: Physics
Which requires more work, lifting a 25 -kg load a vertical distance of 8.5 meters or...
Which requires more work, lifting a 25 -kg load a vertical distance of 8.5 meters or lifting a 15-kg load a vertical distance of 17 m?
Solutions
Expert Solution
solution
work required to lift a mass m through a height of h = force x distance
force = weight ( mg)
= (mg)
where g is acceleration due to gravity ,whose numerical value is 9.8 m/s2
work = mg x h
-------------------------------------------------------------------------------------------------------------------------------------------------------------
Work required to lift a 25 -kg load a vertical distance of 8.5 meters = 25kg x 8.5m x 9.8 m/s2 = 2082.5 joules
-------------------------------------------------------------------------------------------------------------------------------------------------------------------
Work required to lift a 15 -kg load a vertical distance of 17 meters = 15kg x 17 m x 9.8 m/s2 = 2499 joules
-----------------------------------------------------------------------------------------------------------------------------------------------------------------
Therefore lifting a 15 -kg load a vertical distance of 17 meters requires more work than lifting a 25-kg load a vertical distance of 8.5 m .
genius_generous answered 8 months agoRelated Solutions
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Consider the accompanying data on breaking load (kg/25 mm width) for various fabrics in both an...
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1
2
3
4
5
6
7
8
U
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55.0
51.3
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48.8
25.6
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A
28.5
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36.5
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H0: μD = 0 versus
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Fabric
1
2
3
4
5
6
7
8
U
36.2
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51.5
38.9
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25.6
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Note: The data below is formatted such that you can copy and
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1
2
3
4
5
6
7
8
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