Question

if first law of motion holds true,why does a ball rolling on ground stop on its own

Answer 1

Newton's first law of motion states that "Any object continues in its state of rest or motion unless it is compelled by a net external force." ... Rollingfriction occurs because the objects in contact are not perfectly rigid. Ideally,when a ball is placed on a rough surface, only one point of the balltouches the ground.

Answer 2

Newton's first law of motion states that a body at rest or in motion remains in its state of rest or motion unless it is compelled by an external force.

The rolling stone is in motion. But the frictional force (external force) compels it to come to rest.

So the first law of motion is true indeed.