This is the answer just double it
Eight books, each 4.6 cm thick and of mass 1.8 kg, lie on a flat table. How much work work is required to stack them on top of o
1 answer:
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Answer: B. 16 times
Explanation:
The mathematic expression for a magnetic force between two magnets is:
(1)
Where:
is a constant
and
are the magnetic charges, which depends on the size of each magnet
is the distance beteween both magnets
As we can see, this force in inversely proportional to the square of the distance. This means that if we increase the distance, the magnetic force will decrease.
Now, if we increase this value by 4 inches from 1 inch:
(2)
(3)
This means the strength of attraction will be 16 times weaker.