Question

A block of wood weigh 4newton is placed on a horizontal table .it is then pulled by means of a string if the tension in the string is 2.5newton calculate the coefficient of static friction

Answer 1

$\vec T = 2.5N$

$\vec F_g= 4N$

$\vec{F_{fr}}=\vec{T}= 2.5N$

$\vec N = \vec F_g=4N$

$\vec F_{fr}=\mu \vec N$

$\mu = \frac{\vec F_{fr}}{\vec N}=\frac{2.5}{4}= 0.625$

$\text{Answer: }\mu = 0.625$