All The Important Physics Terms You Need To Know

The rate of change of velocity of a body is called acceleration.

Man made objects moving in fixed circular orbits around the Earth.

The branch of Physics that deals with the study of the structure and properties of atoms

A straight line passing through the points of a rotating rigid body while the other points of the body move in circles about the axis.

A quantity which can be expressed independently without the reference of any other quantity.

The units that describe base quantities.

The force acting on an object due to buoyancy of a liquid.

The point of a body where its weight acts.

A point where an applied force causes the system to move without rotation.

Accelereation produced by the centripetal force.

Change in unit length caused by unit kelvin change in temperature.

According to Newton's third law of motion, there exists a   reaction to the centripetal force. The centripetal reaction that pulls the string outward is sometimes called the centrifugal force.

The force which keeps the body moving in a circular path is called the centripetal force and is given by:

$F_{c}=\frac{mv^{2}}{r}$

The motion of a body moving along a circular path is called circular motion. 

Change in unit volume caused by unit kelvin change in temperature.

Transfer of heat due to interaction of electrons or molecules.

Transfer of heat by actual movement of molecules from a hot place to a cold place is known as convection.

When two equal and unlike parallel forces act at different points of a body they constitute a couple.

Negative acceleration.

Density is the ratio of mass to volume of a substance. The density of water is 
$1000 kgm^{-3}$. 

Such quantity which is expressed with reference to base quantities.

The units used to measure derived quantities.

The shortest distance between two points.

Length of a path between two points.

Study of motion of bodies under the action of forces.

The ratio of the useful work done by a device or machine to the total energy taken up by it is called its efficiency.

The intermediate distance between fulcrum and effort.

Product of effort and effort arm.

Force applied on the machine.

Energy of a compressed or strtched spring.

Ratio of stress and strain.

The property of matter by which matter resists any force which tries to change its length, shape, or volume is called elasticity.

The branch of physics deals with the study of the charges at rest and in motion, their effects, and their relationship with magnetism.

The force due to which everybody in the universe attracts every other body.

A state where acceleration of a body is zero.

The changing of a liquid into vapors from the surface of the liquid without heating it.

The gravitational pull of the Earth acts on the body whether the body is in contact with the Earth or not.

The force due to which everybody in the universe attracts every other body.

The agent that changes or tends to change the state of a body.

The point around which earth revolves.

The branch of physics deals with the study of the internal structure of the Erath and tectonic plate motions etc.

Acceleration is due to the gravity of the Earth.

The gravitational force per unit mass.

The field is a region in space in which a particle would experience a gravitational force.

Mutual force of attraction between the objects.

Energy of a body due to its position in the gravitatinal field.

The quantity of thermal energy absorbed by a body for increase in its temperature.

The branch of physics deals with the nature of heat modes of transfer of heat and effects of heat.

The component of a force is along horizontal or x-direction.

The characteristic of a body resists any change in its state of rest or motion.

A work which is done on the machine.

The sum of K.E and P.E is associated with the atoms, molecules, and particles of a body.

A group of interacting bodies on which no force is acting.

The amount of work done when a force of one newton displaces a body through one meter in the direction of the force.

Work done in one hour at a rate of one kilowatt.

Study of motion of bodies without taking into consideration the mass and forces.

The energy of a body is due to its motion.

Friction during motion.

The heat required by a unit mass of a substance at its melting point to change it from a solid state to a liquid state is called the latent heat of fusion.

The quantity of heat required by the unit mass of a liquid at a certain constant temperature to change its state completely from a liquid into a gas is called the latent heat of vaporization.

The unit of distance for celestial bodies equal to $9.46 \times 10^{16}$ m 

The branch of physics deals with the physical aspects of light and its properties: working and uses of optical instruments.

The maximum value of static function.

The motion of a body along a straight line.

The intermediate distance between fulcrum and load.

Product of load and load arm.

Resistance or lifted weight.

The characteristic of a body determines the acceleration produced by the application of a force.

Ratio of load and effort.

The branch of physics deals with the motion of objects, causes, and effects of motion.

The perpendicular distance between the axis of rotation and the line of action of the force.

The product of mass and velocity of a body.

If a body changes its position with respect to its surroundings.

A vector which has the same magnitude but opposite direction of another vector.

The condition of a body in which its center of gravity neither rises nor becomes lower than its original position after being disturbed.

The branch of physics deals with the [properties and behavior of nuclei and the particles within the nuclei.

The critical velocity of a satellite to keep on moving around the Earth at a specific height.

A work which is done by the machine.

The forces which are parallel to each other.

The components of a force are mutually perpendicular to each other.

All measureable quantities.

The branch of physics deals with the study of production, and properties of the ionic state of the matter-the fourth state of matter.

Position means the location of a certain place or object from a reference point.

Physics is a branch of science that deals with matter, energy and their relationship.

The energy possessed by a body due to its position.

Power is defined as the rate of doing work. 

The words or letters added before a unit and stand for the multiples or sub-multiples of that unit are known as prefixes. For example, kilo, mega, million, micro, etc.

Pressure is the normal force acting per unit area. Its SI unit is $Nm ^{-2}$ or pascal (Pa). 

Transfer of heat by infra-red radiators requires no medium for their transmission.

Motion without any consideration of time and direction.

The amount of heat that flows in unit time.

Splitting up of a force into its components

If a body does not change its position with respect to its surroundings.concerning

The sum of two or more forces is called the resultant force.

Negative acceleration.

Rolling friction is the force of friction between a rolling body and a surface over which it rolls. Rolling friction is lesser than the sliding friction.

The motion in which a body moves around an axis passing through it.

Physical quantities which are described by their magnitude only are known as scalars. 

Logical applications of arguments that explain a certain phenomenon.

The numbers are written as power or prefix of ten in which there is only one non-zero number before the decimal.

A thing which helps in doing work more easily.

All the accurately known digits and the first doubtful digit in an expression are called significant figures. It reflects the precision of a measured value of a physical quantity.

The friction between two surfaces sliding against each other.

The branch of physics deals with the physical aspects of sound waves.

The quantity of heat changes the temperature of one kilogram of mass by 1 K.

The distance traveled in any direction by a boy in unit time is called speed.

The property of a body that does not undergo any change without the application of an external agency.

The condition of a body in which it comes to its original position after being disturbed.

The force of friction arises due to an applied external force before motion.

The change in the shape of an object under the action of an external force.

Stress is the deforming force acting per unit area.

The force acts along the surface of a liquid.

The temperature of a body is the degree of hotness or coldness of the body.

The ratio of change of length to the original length is called tensile strain.

The force acting along a string.

The rate of flow of heat across the opposite faces of a meter cube maintained at a difference of 1 K is called the thermal conductivity of the material of the cube.

Thermometers are made to measure the temperature of a body of places

The ratios of the slides of a right-angled triangle.

The motion of a body when it moves along a line without rotation.

The property of a system is when all parts of the system have the same temperature along with its surrounding.

The capacity of a force to rotate a body.

A body has uniform acceleration if it has equal chances in its velocity in equal intervals of time, however small the interval may be.

If the speed of a body does not change with time then its speed is uniform.

If a body covers equal displacements in equal intervals of time, however small the interval may be, then its velocity is said to be uniform.

Forces that are parallel but have direction opposite to each other.

If a body does not return to its previous position when set free after a slight tilt is said to be in unstable equilibrium.

Physical quantities which are described by their magnitude and direction are known as vectors.

We define velocity as the rate of change of displacement or speed in a specific direction.

The zig-zag motion of the molecules of gases and liquids.

1. The power of a body is one watt which is doing work at the rate of one joule per second.

The weight of a body is the force of gravity acting on it. It is a vector quantity. SI unit of weight is Newton (N). 

1. Work is said to be done when a force acting on a body moves it in the direction of the force.

• Work = FS
• SI unit of work is the joule (J).

The ratio between stress and tensile strain is called Young's modulus.