Typical examples of inertia include a passenger's body slightly moving backwards when a vehicle suddenly starts; a passenger's body leaning forward when a moving vehicle stops and a passenger's body jerking to the side when a vehicle maneuvers a sharp turn. Inertia is one of the defining characteristics of matter, which refers to the tendency of any object to remain at rest or continuously move along a straight line.
Know MoreInertia is classified into three types: inertia of rest, inertia of motion and inertia of direction. A leaf falling from the branch of a tree that is disturbed by a strong wind is an example of inertia of rest. A person that falls down after carelessly jumping off a moving train is an example of inertia of motion. Mud that sticks to rotating wheels and are thrown tangentially is an example of inertia of direction.
Learn more about Motion & MechanicsInertia is a scalar, something that only has a magnitude, and is defined as the resistance of an object to its state of motion, which also includes the state of rest. An object's mass is a measure of its inertia. Momentum is a vector, something that has a magnitude and direction. It's a measure of an object's motion and is dependent on the product of an object's mass and velocity.
Full Answer >Calculating the moment of inertia for a rod requires you to know the mass, length and location of the rotational axis. An estimation may be required with regards to the position of this axis.
Full Answer >One example of the law of inertia is that a package thrown from a plane will move as fast as the plane in the same direction. The law of gravity affects the package, and while the horizontal axis speed is the same as the plane, the vertical axis speed increases.
Full Answer >The moment of inertia of a sphere is I = 2/5 MR^2 for a solid sphere and I = 2/3 MR^2 for a thin spherical shell. This moment of inertia can be derived from the moment of inertia of a thin disk by summing the moments of inertia of a series of infinitely thin disks throughout the volume of the sphere.
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