A seesaw with a mass of 5kg has one block of mass 10kg two metres to the left of fulcrum and another block 0.5m to the right of the fulcrum. As shown below. If seesaw is in equilibrium, find the force exerted by the fulcrum.
Correct answer: C. 550 N
- A. 15 N
- B. 40 N
- C. 550 N
- D. 500 N
Explanation
Option C is correct because the combined gravitational forces on the seesaw and the blocks must equal the force exerted by the fulcrum to maintain equilibrium. The gravitational force on the seesaw itself (5 kg) combines with the gravitational forces on the two blocks (10 kg and the unknown mass on the right side). The correct calculation shows that 550 N is required for balance, considering the distance of each mass from the fulcrum. Options A, B, and D do not account for these factors accurately, leading to incorrect values.
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