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A moving body of mass m and velocity 3 k...

A moving body of mass m and velocity 3 km/hr collides with a rest body of mass 2m and sticks to it. Now the combined mass starts to move. What will be the velocity of the combined mass ?

A

3 km/hour

B

1 km/hour

C

2 km/hour

D

4 km/hour

Text Solution

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The correct Answer is:
B
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Knowledge Check

  • A body of mass 'm' moving with 3 km hr^(-1) collides with a body of mass 2 m at rest and sticks to it. The combination starts moving with velocity :

    A
    `4 Kmhr^(-1)`
    B
    `3 Kmhr^(-1)`
    C
    `2 Kmhr^(-1)`
    D
    `1 Kmhr^(-1)`

  • If a body of mass m moving with velocity v collides with another body of mass m at rest. If e is the coefficient of restitution then find the ratio of final velocities of two bodies :

    A
    `(v_(1))/(v_(2))=(1-e)/(1+e)`
    B
    `(v_(1))/(v_(2))=(1+e)/(1-e)`
    C
    `(v_(1))/(v_(2))=e`
    D
    None of these

  • A body of mass m, moving with the some velocity v collides with another body of same mass moving with same speed but in the opposite direction, sticks to it. The velocity of the compound body after collision is :

    A
    `nupsilon`
    B
    `2upsilon`
    C
    0
    D
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