PH-1832
Principle of moments
Physics · Secondary 4 · Medium · Principle of moments
A uniform wooden plank of weight 120 N is supported horizontally at its two ends by supports P and Q. A 60 N boy stands on the plank at a point midway between P and Q.
What is the total upward force provided by the two supports?
What is the total upward force provided by the two supports?
- 180 N
- 60 N
- 120 N
- 240 N
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