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What is the difference in the positions of a girl carrying a bag in one of her hands and another girl carrying a bag in each of her two hands?

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i) a) When she carries a bag in one hand her centre of mass will shift to the side of the hand that carries the bag.
b) When a bag is in one hand some unbalanced force will act on her and it is difficult to carry.
ii) If she carries two bags in two hands then her centre of mass remains unchanged. Force on two hands are equal i.e. balanced so it is easy to carry the bags.
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