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The acceleration which can change only t...

The acceleration which can change only the direction of velocity of a body is called

A

Acceleration due to gravity

B

Uniform acceleration

C

Centripetal acceleration

D

Centrifugal acceleration

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  • A body starts from a point with a velocity and uniform acceleration a. The direction of acceleration is reversed when the velocity of the body becomes 5u. The velocity of body al point will be

    A
    `-v`
    B
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  • A body has an initial velocity of 3 ms^(-1) and has an acceleration of 1 m s^(-2) normal to the direction of the initial velocity. Then its velocity, 4 second after the start is:

    A
    7 `ms^(-1)` along the direction of initial velocity
    B
    7`ms^(-1)` along the normal to the direction of the initial velocity
    C
    7`ms^(-1)`mid-way between the two directions
    D
    %`ms^(-1)` at angle of `"tan"^(-1)(4)/(3)` with the direction of the intial velocity.

  • A small body is placed on the top of smooth sphere of radius R. The sphere is imparted a constant acceleration a_(0) = ng in the horizontal direction. The body begins sliding down. Find the velocity of body relative to the sphere at the moment it just leaves the surface of sphere:

    A
    `sqrt((2gr)/(3))`
    B
    `sqrt((3gr)/(3))`
    C
    `sqrt((gr)/(3))`
    D
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