PH-1828
Moments
Physics · Secondary 4 · Hard · Moments
A uniform 2.0 m plank of weight 200 N is pivoted at its centre. A 150 N child stands 0.50 m from the left end of the plank.
Using the principle of moments, what additional downward force must be applied at the right end to keep the plank horizontal?
Using the principle of moments, what additional downward force must be applied at the right end to keep the plank horizontal?
- 25 N
- 50 N
- 75 N
- 150 N
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