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A body of mass 4kg moving along a straig...

A body of mass `4kg` moving along a straight line under the action of a force.If kinetic energy varies with time as `k=8t` .The force acting on the body is ?

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Knowledge Check

  • A body of mass 1kg is moving along a straight line with a velocity of 1m//s . The external force acting in the body is

    A
    `1N`
    B
    1 dyne
    C
    `1J`
    D
    zero

  • A rigid body moves a distance of 10 m along a straight line under the action of a force of 5 N. If the work done by this force on the body is 25 joules, the angle which the force makes with the direction of motion of the body is

    A
    `0^@`
    B
    `30^@`
    C
    `60^@`
    D
    `90^@`

  • A body moves a distance of 10 m along a straight line under an action of 5 N force. If work done is 25 J, then angle between the force and firection of motion of the body will be :

    A
    `75^(@)`
    B
    `60^(@)`
    C
    `45^(@)`
    D
    `30^(@)`

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