Question

A block of mass 1.5kg placed on a rough horizontal surface is pulled by a constant horizontal force of 1.2kgf the cofficient of friction between the block and the surface is 0.3 . Find the accerlation produced in terms of g

Answer 1

Answer:

Explanation:

first of all, we have to check block of mass 1.5kg moves or not.

find static friction ,  

we know,  

= 0.3 × mg = 0.3 × 1.5 × 10 = 4.5 N

but force is applied 1.2kg-f or 12N

here we can see that applied force is greater than static friction so, block moves with an acceleration .

Let acceleration of block is a.

12 - 4.5 = 1.5 × a

7.5 = 1.5 × a => a = 5 m/s²