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The formula for calculating force in a lever system is Force1 x Distance1 = Force2 x Distance2.
Given:
Force1 = 960 N
Distance1 = 2 m
Distance2 = 45 cm = 0.45 m
Now we can substitute the values into the formula:
960 N x 2 m = Force2 x 0.45 m
1920 N = 0.45 Force2
Force2 = 1920 N / 0.45
Force2 = 4266.67 N
Therefore, the gardeners use 4266.67 N of force to lift the potted tree onto the deck.
So the closest option would be:
A. 21,600 N