If a ladder weighting 250 N is placed ag...

If a ladder weighting `250 N` is placed against a smooth vertical wall having coefficient of friction between it and floor 0.3, then what is the maximum force of friction available at the point of contact between the ladder and the floor?

`75N`

`50N`

`35N`

`25N`

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The correct Answer is:

`F=muR=0.3xx250=75N`

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