Question 154: Laws of Motion

Question

A horizontal force of $$10$$ $$N$$ is necessary to just hold a block stationary against a wall. The coefficient of friction between the block and the wall is $$0.2$$. The weight of the block is

Accepted Answer

Assume weight of the block = $$W$$ and friction force = $$f$$ = $$\mu N$$
For the block to remain stationary with the wall, weight of the block should balanced by the force of friction.
$$	herefore$$ $$f=W$$
$$ \Rightarrow $$ $$\mu N = W$$
$$ \Rightarrow $$ $$W$$ = 0.2 $$ 	imes $$ 10 = 2 N

Answer

$$20N$$

Answer

$$50N$$

Answer

$$100N$$

Answer

$$2N$$

Laws of Motion

A horizontal force of $10 N is necessary to just hold a block stationary against a wall. The coefficient of friction between the block and the wall is 0.2$. The weight of the block is

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