The rock has a mass of 1 kg. What is the mass of the measuring stick if it is balanced by a support force at the one-quarter mark? The centre of mass of the measuring stick is at the one-half mark, one-quarter of the sticks length beyond the pivot.a)0.5 kgb)4 kgc)2 kgd)1 kgCorrect answer is option 'D'. Can you explain this answer?

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The rock has a mass of 1 kg. What is the mass of the measuring stick if it is balanced by a support force at the one-quarter mark? The centre of mass of the measuring stick is at the one-half mark, one-quarter of the stick’s length beyond the pivot.

a)
0.5 kg
b)
4 kg
c)
2 kg
d)
1 kg

Correct answer is option 'D'. Can you explain this answer?

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The rock has a mass of 1 kg. What is the mass of the measuring stick i...

The stick is balanced by the 1 kg rock that is one-quarter of its length to the left and by its own weigh which is at the Centre of Mass, one-quarter of its length to the right. Therefore, the mass of the stick must be one kilogram, 1 kg.

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