^Internal force Acting with in the system selected & can’t accelerate a body. For a complete system internal forces are equal & opposite (i.e. obey third law) & thus cancel out. The work done internal forces for a complete system cancel out.
^Examples of Newton’s third law A fireman has to hold the pipe strongly to prevent it form going backward as the water flowing out of the pipe pushes it backwards. No action can occur in the absence of a reaction. e.g. in a tug-of-war, one team can pull the rope only if the other team […]
^Newton’s third law 3rd law is called action reaction law.
^Newton’s second law NSL defines force. External force is required to accelerate a body (change speed or direction or both). When a body is seen from inertial frame of reference, the time rate of change of linear momentum is equal to the net external force acting on the body & takes place in the direction […]
^Newton’s first law
^Newton’s law of motion Isaac Newton (1643 – 1727) published Principia Mathematical in 1687. In this work, he proposed three “laws” of motion.
^Spectrum of hydrogen atom
^Pseudo force Imaginary forces experienced in non – inertial frame are called pseudo forces. A pseudo force experienced due to increase or decrease of speed is called tangential pseudo force. Following drawings show direction of pseudo force acting on a block in different situations:
^Rydberg’s formula Let ‘E’ be the energy & λ be the wavelength of the photon released when an electron jumps from a higher quantum state of principal quantum number n2 to a lower quantum state having principal quantum number n1, then Note Rydberg’s constant depends on mass of Electron, thus it is not a universal […]
^Inertial & non inertial frame of reference Accelerated frames are called non inertial & frames having zero acceleration are called inertial or Newtonian or Galilean frame of reference, thus any frame of reference at rest or moving with constant velocity with respect to a stationary frame of reference is also inertial. A frame of reference […]
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