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Two bodies of masses 2 kg and 4 kg are m...

Two bodies of masses 2 kg and 4 kg are moving with velocities 2 m/s and 10 m/s respectively along same direction. Then the velocity of their centre of mass will be

A

`8.1 m//s`

B

`7.3 m//s`

C

`6.4 m//s`

D

`5.3 m//s`

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Knowledge Check

  • Two spheres of masses 1 kg and 2 kg are moving with velocities of 10 m/s and 5 m/s respectively in the same direction. After the collision the velocity of the lighter sphere decreases by 4 m/s. What is the coefficient of restitution?

    A
    0.1
    B
    0.15
    C
    0.2
    D
    0.25

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    A
    `5 ms^(-1)`
    B
    `6 ms^(-1)`
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