PH-1801
Moments
Physics · Secondary 4 · Hard · Moments
A 3.0 m long uniform plank of weight 120 N is supported at its two ends. A 60 N boy stands 1.0 m from the left end.
What is the upward force on the right support?
What is the upward force on the right support?
- 40 N
- 60 N
- 80 N
- 120 N
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