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velocity and Momentum...

velocity and Momentum

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Momentum is product of velocity and magnitude of velocity”. True or False ?

The kinetic energy of electron is 4.55 xx 10^(-25) J and mas is 9.1 xx 10^(-31) kg then calculate velocity , momentum and wave length of electron.

Knowledge Check

  • if uncertainty in position and momentum are equal then uncertainty in velocity is

    A
    `(1)/(2m) sqrt((h)/( pi))`
    B
    `(1)/(m) sqrt((h)/(2pi))`
    C
    `squr((h)/(pi))`
    D
    `squr((h)/(pi))`

  • If P, v and E denotes the momentum, velocity and K.E. of a particle then ......

    A
    `p=(d^(2)E)/(dt^(2))`
    B
    `p=(dv)/(dt)`
    C
    `p=(dE)/(dv)`
    D
    `P=(dE)/(dt)`

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    Force and momentum

    A ball of mass m collides with the ground with velocity and then comes up in the same direction with the same velocity. The change occurred in the momentum of this ball ……..

    Assertion: In case of projectile motion, acceleration horizontal component of velocity and mechanical energy remains unchanged but speed. Vertical component of velocity, momentum K.E. and P.E. change. Reason: In the presence of air resistance, the range and maximum height attained reduce, but time of flight increases.

    If the velocity of an object is made thrice, then its momentum would become ......... times.

    If frequency (F), velocity (v) and density (D) are considered as fundamental units the dimensional formula for momentum will be.....

    A particle is moving along a straight line parallel to x-axis with constant velocity and position vector is vthati+bhatj . Find angular momentum about the origin in vector form :

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