Question

Galileo's law of inertia is another name for Newton's first law of motion.

Answer 1

1. Galileo's law of Inertia states that a system in rest will remain in rest, and a system in motion will remain in motion forever until and unless compelled by any external force.
2. Galileo's law of inertia is a special case of Newton's second law of motion which states that the rate of change of linear momentum of a system is directly proportional to the external force applied to the system.
3. If ‘p’ is the momentum of the system and ‘F’ is the external force applied to the system, then according to Newton's second law of motion.
4. F=$\frac{dp}{dt}$
5. If F=0 then $\frac{dp}{dt}$=0 i.e. p is constant.
6. Since momentum is constant, the system will remain in constant motion or at rest until and unless an external force is applied.

Hence Newton's first law of motion is same as the Galileo's Law Of Inertia.