Question 57: Laws of Motion

Question

The coefficient of static friction between a wooden block of mass 0.5 kg and a vertical rough wall is 0.2. The magnitude of horizontal force that should be applied on the block to keep it adhere to the wall will be _________ N. [g = 10 ms
$$-$$2
]

Accepted Answer

Given, coefficient of static friction, $$\mu$$
s
= 0.2
Various forces acting on block are shown below
Frictional force $$\le$$ mg
$$\Rightarrow$$ N $$	imes$$ 0.2 $$\le$$ 5
$$\Rightarrow$$ N $$\le$$ 25
$$	herefore$$ Magnitude of horizontal force, F = N = 25 N

Laws of Motion

The coefficient of static friction between a wooden block of mass 0.5 kg and a vertical rough wall is 0.2. The magnitude of horizontal force that should be applied on the block to keep it adhere to the wall will be _________ N. [g = 10 ms $-$2 ]

Integer / Numeric Answer Type