Physics Class 11 Chapter 5. Laws of Motion | Page 6

Newton’ s First law of motion o
A body at rest tends to remain at rest and a body in uniform motion tends to remain in the state of uniform motion until & unless an external force is applied on it.
For example, a ball lying on the table at rest will remain at rest until an external force is applied on it.
Balanced & Unbalanced forces Balanced Forces: o o
Equal & Opposite forces Do not cause any change in motion