A force of 3kg wt is sufficient to pull a block of 4kgwt over a flat surface. What is the angle of friction ?

A force of 3kg wt is sufficient to pull a block of 4kgwt over a flat s

1.	A force of 3kg wt is sufficient to pull a block of 4kgwt over a flat surface. What is the angle of friction ?
Answer» SOLUTION :`tantheta=mu_(2)=F//N=3g//4g=0.75`, `theta=36.86^(@)`