H2P-71
Principle of moments
H2 Physics · JC 1 · Medium · Principle of moments
A uniform 2.0 m plank of weight 120 N rests horizontally on two supports at its ends. A box of weight 80 N is placed 0.50 m from the left end. What is the reaction force at the right support?
- 40 N
- 60 N
- 80 N
- 120 N
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