Question

A spool is pulled horizontally by two equal and opposite forces on rough surface. The correct statement is :

(a) centre of mass of spool moves towards right 

(b) centre of mass of spool moves towards left 

(c) centre of mass remains at rest 

(d) none of these

Answer 1

Correct option: (a) centre of mass of spool moves towards right

Explanation:

The sliding tendency of bottom most point of the spool is backward, so friction acts rightwards. Therefore centre of mass of spool moves rightwards