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An object moves at constant speed along ...

An object moves at constant speed along a cicular path in a horizontal xy plane. With the centre as origin.when the object is at x= -2m , it s velocity is ` -4hatj`m/s , its acceleration when it is at y= 2 m/s

A

` -8 hati m//s^(2)`

B

`-2hatj m//s`

C

`-8 hatj m//s^(2) `

D

`2 hatj m//s^(2)`

Text Solution

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The correct Answer is:
C
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Knowledge Check

  • An object moves at a constant speed along a circular path in a horizontal XY plane, with the center at the origin. When the object is at x=-2m , its velocity is -(4m//s)hatj . What is the object's acceleration when it is y=2m

    A
    `-(8m//s^(2))vecj`
    B
    `-(8m//s^(2))veci`
    C
    `-(4m//s^(2))vecj`
    D
    `-(4m//s^(2))veci`

  • A car is moving in a circular path of radius 500m with a speed of 30 m//s . If the speed is increased at the rate of 2 m//s^(2) , the resultant acceleration will be .

    A
    `2 m//s^(2)`
    B
    `2.5 m//s^(2)`
    C
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