Difference between Inertia at rest and motion
Inertia at rest
1) The tendency of body to resist change in its state of rest is termed as inertia of rest.
2) External unbalanced force is required to overcome the inertia.
3) The mass of object provides the inertia at rest.
4) Due to gravity, product of mass and acceleration due to gravity i.e. weight of object contributes the inertia when it is at rest.
5) Eg. A stone at the peak of mountains doesn’t falls down unless somebody pushes it with large force.
Inertia at motion
1) The tendency of body to resist change of its state of motion is termed as inertia of motion. 2. Unbalanced force is required to change the state of motion of object to rest or vice versa.
2) Mass and velocity both contributes for inertia at motion.
3) Product of mass and velocity i.e. momentum contributes the inertia to the object in motion.
4) Eg. Cycle in motion will not stop immediately even if we stop pedalling.