Science Class 5 Other

Asked by AKSHAY GURU VARADHARAJAN · SRI CHAITANYA TECHNO SCHOOL, JAYANTI NAGAR.

Rohan wants to lift a heavy rock using a long wooden plank and a small stone as a fulcrum. To make his work easiest, where should he place the fulcrum?

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A Exactly in the middle of the plank.
B Closer to his hands (effort).
C Closer to the heavy rock (load).
D Position does not matter.

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Answer: C. Closer to the heavy rock (load).

The correct answer is C. In a class 1 lever, placing the fulcrum closer to the load increases the mechanical advantage, making it easier to lift a heavy object with less effort.

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Rohan wants to lift a heavy rock using a long wooden plank and a small stone as a fulcrum. To make his work easiest, where should he place the fulcrum?

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