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A bullet of mass 10 gm moving with a hor...

A bullet of mass 10 gm moving with a horizontal velocity `100m//s` passes through a wooden block of mass 100 gm. The block is resting on a smooth horizontal floor. After passing through the block the velocity of the bullet is `10m//s`. the velocity of the emerging bullet with respect to the block is

A

`10 m//s`

B

`9 m//s`

C

`1 m//s`

D

`5 m//s`

Text Solution

Verified by Experts

The correct Answer is:
C
`m_(1)u_(1)=m_(1)v_(1)+m_(2)v_(2), v_("rel")=v_(1)-v_(2)`
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Knowledge Check

  • A bullet of mass 10gm moving with a horizontal velocity 100m//s passes through a wooden block of mass 100gm . The block is resting on a smooth horizontal floor. After passing through the block the velocity of the bullet is 10m//s the velocity of the emerging bullet with respect to the block is .

    A
    `10m//s`
    B
    `9m//s`
    C
    `1m//s.`
    D
    `5m//s`

  • A bullet of mass m moving with velocity v strikes a suspended wooden block of mass M. If the block rises to a height h, the initial velocity of the block will be

    A
    ` sqrt( 2gh ) `
    B
    ` (M+m)/( m) sqrt( gh ) `
    C
    ` ( m )/( M+m) 2gh `
    D
    ` (M+m)/( M) sqrt( 2gh) `

  • If a bullet of mass 5gm moving with velocity 100m//sec, penertates the wooden block upto 6cm. Then the average force imposed by the bullet on the block is

    A
    8300N
    B
    417N
    C
    830N
    D
    zero