A block is placed on a smooth horizontal surface, and forces are applied to it as shown in the diagram. Take \(g=10~\text{m/s}^2.\) The normal reaction acting on the block is:
           

1. \(100~\text N\)
2. \(60~\text N\)
3. \(40~\text N\)
4. \(20~\text N\)
Subtopic:  Tension & Normal Reaction |
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