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A body is projected with an initial Velo...

A body is projected with an initial Velocity 20 m/s at 60° to the horizontal. Its initial velocity vector is- (g=10 `m//s^2`)

A

`10hati -20 hatj`

B

`10sqrt(3)hati + 10 hatj`

C

`10hati + 10sqrt(3)hatj`

D

`5hati + 5sqrt(3)hatj`

Text Solution

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The correct Answer is:
C
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Knowledge Check

  • A body is projected with an initial Velocity 20 m/s at 60° to the horizontal. Its velocity after 1 sec is

    A
    `10i + 7.32 j`
    B
    `10i - 7.32j`
    C
    `10i + sqrt(3) j`
    D
    `10i-sqrt(3)j`

  • A body is projected with a velocity 60 ms^(-1) at 30° to horizontal. Its initial velocity vector is

    A
    `10hati + 10sqrt(3) hatj`
    B
    `30hati + 30sqrt(5) hatj`
    C
    `30sqrt(3)hati + 30 hatj`
    D
    `30sqrt(3) hati`

  • A body is projected with a velocity 60 ms^(-1) at 30^(@) to horizontal. Its initial velocity vector is

    A
    `10 hati+10 sqrt(3) hatj`
    B
    `30 hati+30 sqrt(3) hati`
    C
    `10 sqrt(3) hatj`
    D
    `30 sqrt(3)hati`

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