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A ladder leans against a wall if the lad...

A ladder leans against a wall if the ladder Is not to slip which one of the following must be true?

A

the coefficient of friction between the ladder and the wall must not be zero

B

the coefficient of friction between the ladder and the floor must not be zero

C

Both A and B

D

Either A or B

Text Solution

Verified by Experts

The correct Answer is:
B

`N_(2)` can only be balanced by `f_(1)`
but `f_(2)` can be zero as in verticle mg can be balanced by N alone
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BANSAL-MASTER PRACTICE PROBLEM-Additional topic
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