PH-1855
Moments
Physics · Secondary 4 · Medium · Moments
A 3.0 m long uniform plank of weight 150 N is supported at its two ends. A 250 N boy stands 1.0 m from the left end. What is the reaction force at the right support?
- 110 N
- 160 N
- 190 N
- 260 N
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