A uniform pencil is held horizontal with a thumb at the end and index finger under it 3 cm from the end. If the pencil has a mass of 20g and is 15 m long, what is the force on the index finger due to the pencil?
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A uniform pencil is held horizontal with a thumb at the end and index finger under it 3 cm from the end. If the pencil has a mass of 20g and is 15 m long, what is the force on the index finger due to the pencil?
The length of the pencil is 15 m.
Its mass is 20 g
Thus mass per meter is
So mass of 3 cm of the pencil is
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