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Relative speed of two bodies moving in o...

Relative speed of two bodies moving in opposite direction with speed u and v m/s.

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Relative speed of two bodies moving in same direction with speed u and v m/s: where (u>v)

Statement-1 : The relative velocity between any two bodies moving in opposite direction is equal to sum of the velocities of two bodies. Statement-2 : Sometimes relative velocity between two bodies is equal to difference in velocities of the two.

Knowledge Check

  • A ball weighing 2 kg and speed 6 m//s collides with another ball of 4 kg moving in opposite direction with speed of 3 m//s . They combine after the collision. The speed of this combined mass (in m//s ) is :

    A
    4
    B
    2
    C
    0
    D
    3

  • A ball weighing 2 kg and speed 6 m//s collides with another ball of 4 kg moving in opposite direction with speed of 3 m//s . They combine after the collision. The speed of this combined mass (in m//s ) is :

    A
    4
    B
    2
    C
    0
    D
    3

  • Two identical balls moving in opposite directions with speed 20 m/s and 25 m/s undergo head on perfectly inelastic collision. The speed of combined mass after collision is

    A
    20 m/s
    B
    22.5 m/s
    C
    25 m/s
    D
    2.5 m/s

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    Relative speed of two persons moving with u m/s and vm/s in opposite direction where u>v

    Relative speed of two persons moving with u m/s and m/s in same direction where u>V

    Two identical balls moving in opposite direction with speed 20 m/s and 25 m/s undergo head on perfectly inelastic collision. The spped of combined mass after collision is

    Two bodies are moving in opposite direction with speed V. What is the magnitude of their relative velocity ?

    Two trains are moving in opposite directions with speeds of6m/s and 12m/s, respectively. Find their relative speed.

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