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52 Cards in this Set

  • Front
  • Back


Distance moved in a particular direction


Distance traveled per unit time


Distance traveled in a particular direction per unit time


Rate of change of velocity

Newton's first law of motion

Every body will continue in it's state of rest, or with uniform velocity unless acted on by a resultant force

Newton's second law of motion

For a body of constant mass, it's acceleration is directly proportional to the resultant force applied on it

Newton's third law of motion

Whenever one body exerts a force on another, the second body exerts an equal and opposite reaction force


Measure of inertia of a body


Gravitational force exerted on an objects mass


Rate of change of momentum

Principle of conservation of momentum

If no external force acts on a system, the total momentum of the system remains constant

Elastic Collisions

A collision in which both the total momentum, and the total kinetic energy of a system is conserved

Inelastic Collisions

A collision in which the total momentum is conserved, but total kinetic energy isn't


Resultant force on a submerged object due to the upward pressure of the fluid applied on it

Center of gravity

The point on an object at which the entire weight of the body seemingly acts


It is the turning effect of a force

Torque of a couple

The turning effect caused by two equal and opposite forces whose lines of action do not coincide

The principle of moments

The sum of the clockwise moments taken about any point is equal to the sum of the anti-clockwise moments taken about the same point when a system is in equilibrium


Stored ability to do work


It is the product of a force and the time during which the force is applied


The product of a force and the distance moved in the direction of the force


Rate of doing work


The fraction of the useful power output obtained from the total power input


Mass per unit volume


The arrangement of the particles in the material are arranged in a regular 3-D lattice with well-defined structures visible


(without form) No regular repeating structure of particles in the material


Composed of long regular molecule chains and cross linking of these chains

Can undergo great strain and deform to a very great degree


Undergo plastic deformation after considerable elastic deformation


Does not exhibit any plastic deformation before breaking

Ultimate tensile strength

The maximum value of stress a material can withstand before breaking


Perpendicular force per unit area


Perpendicular force per unit area


Extension per unit length

Strain energy

The energy stored in a body due to a change in shape

Young's modulus

Ratio of stress to strain - constant of proportionality

Elastic deformation

Temporary distortion-material returns to it's original shape on removal of the distorting force

Plastic deformation

When a small increase in stress causes a large increase in the strain

Stress vs strain graphs (gradient and area under)

Gradient=Young's modulus

Area=Work done or energy

Electric field

Region of space where electric charge experiences a force

Electric current

Rate of flow of charged particles


1 coulomb per second passing through an electrical component

Potential difference

Energy converted from electrical to other forms of energy when unit charge passed through it


The p.d. between 2 points in which one joule of energy is converted when one coulomb of charge passes


Ratio of p.d. to current


One volt per ampere


The resistance between opposite faces of a cute of the material, of unit length and unit cross sectional area


1 coulomb is the amount of charge required to maintain a current of one ampere

Ohm's law

The current through a conductor is proportional to the p.d. across it provided that it's temperature remains constant


A specific type of resistor, as temperature increases, resistance decreases

Electromotive force (e.m.f.)

Energy converted to electrical energy per unit charge

Kirchhoff's first law

The algebraic sum of the current at a junction is zero

Related to the conservation of charge

Kirchhoff's second law

Around any closed loop in a circuit, the algebraic sum of the e.m.fs is equal to the algebraic sum of the p.ds

Related to the conservation of energy