Laws of Motion 3 Question 6
6. In the figure, a ladder of mass is shown leaning against a wall. It is in static equilibrium making an angle with the horizontal floor. The coefficient of friction between the wall and the ladder is and that between the floor and the ladder is . The normal reaction of the wall on the ladder is and that of the floor is . If the ladder is about to slip, then
(2014 Adv.)
(a)
(b)
(c)
(d)
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Answer:
Correct Answer: 6. (b)
Solution:
- NOTE
It is not given in the question, best assuming that both blocks are in equilibrium. The free body diagram of two blocks is as shown below,
Reaction force,
For vertical equilibrium of
For vertical equilibrium of