Question 161: Laws of Motion

Question

Given in the figure are two blocks $$A$$ and $$B$$ of weight 20 N and 100 N, respectively. These are being pressed against a wall by a force $$F$$ as shown. If the coefficient of friction between the blocks is 0.1 and between block $$B$$ and the wall is 0.15, the frictional force applied by the wall on block $$B$$ is :

Accepted Answer

Assuming both the blocks are stationary
From the F.B.D of both the blocks we can find,
$$N=F$$
f
1
= 20 N
f
2
= 100 + 20 = 120 N
Considering those two blocks as one system and due to equilibrium $$f=120N$$

Answer

$$120$$ $$N$$

Answer

$$150$$ $$N$$

Answer

$$100$$ $$N$$

Answer

$$80$$ $$N$$

Laws of Motion

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