The drift caused by an electric field is called the electric drift. The velocity of the electric drift is the same for electrons and ions, both in magnitude and direction.

Gravitational field A simple example of a force drift is a plasma in a gravitational field, e.g. the ionosphere. The drift velocity is. Because of the mass dependence, the gravitational drift for the electrons can normally be ignored.

This force gives rise to an inertial drift and to a corresponding drift current. An especially important case, in which acceleration results from a change in the rate of electrical drift, is caused by variations in the electric field. This particular case of inertial drift is therefore called the polarization drift.

Curvature drift is a mode of motion of charged particles in a curved magnetic field. In contrast to the motion of charged particles in a uniform magnetic field, where the charged particles gyrate around the magnetic fields, in curvature drift the particles move mostly parallel to the magnetic field.

F = BIL (f=force, b=magnetic field, i=current, l=length of conductor)

To demagnetize a nail magnetized by prolonged contact or rubbing, banging the nail on a hard surface or dropping it to the floor shakes up the aligned atoms with sharp impact. For the electromagnet, simply detaching one end of the copper wire from its terminal kills the magnetic field.

The state of motion of an object is defined by its velocity – the speed with a direction. Thus, inertia could be redefined as follows: Inertia: tendency of an object to resist changes in its velocity. Such an object will not change its state of motion (i.e., velocity) unless acted upon by an unbalanced force.

In the world of mechanics, there are four basic types of motion. These four are rotary, oscillating, linear and reciprocating.

In the first law, an object will not change its motion unless a force acts on it. In the second law, the force on an object is equal to its mass times its acceleration. In the third law, when two objects interact, they apply forces to each other of equal magnitude and opposite direction.

This is also known as the law of inertia. Inertia is the tendency of an object to remain at rest or remain in motion.

Explanation: The pen will be always in rest…even in movement also.. there will be no forces in the movement of the pen..

Well, motion is caused by a force. The force causes any stationary object to move as it acts on and makes it change its position. Once the motion occurs, it keeps moving with the same speed and in the same direction unless another external force acts on it.

Answer: An object is in motion if its distance relative to another object is changing. To tell if an object is moving, you use a reference point. If an object’s distance from another object [reference point] is changing.

The Importance of Motion Movement is a vital nutrient to your body, just as much as food, water or oxygen. It feeds the brain, producing essential nutrient stimulation (called proprioception).

Distance is a scalar quantity that refers to “how much ground an object has covered” during its motion. Displacement is a vector quantity that refers to “how far out of place an object is”; it is the object’s overall change in position.

Google Maps can tell you your speed, it has an inbuild speedometer, which is only currently for Android users. It is on by default, but to make sure if it is on, go to settings → navigation settings, and under the driving options menu there will be a slider for it.

Physics Symbols for Some Basic Quantities: