Question

Answer please
Which weight requires the least force to move?

Answer 1

A requires the least force to move

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Answer 2

According to the given figure, the weight that requires the least amount of force to move is the first block (A).

• This question can easily be solved by making free body diagrams for both the weights and comparing the weights on the strings of both the weights.
• In the first system, during a limiting case, a force 2T will be applied upwards, while a force of 10 g will be applied downwards. This will make A = T = 5 g for the limiting case, which means 5 g force is required to move the block.
• In the second system, during a limiting case, a force T will be applied upwards, while a force of 10 g will be applied downwards. This will make B = T = 10 g for the limiting case, which means 10 g force is required to move the block.