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A constant retarding force of 50 N is ap...

A constant retarding force of 50 N is applied to a body of mass 20 kg moving initially with a speed of `15 m s^(-1)` . How long does the body take to stop ?

Text Solution

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`a = -2.5 ms^(-2)` , using `v= u + at , 0 = 1 - 2.5 t i.e., t = 6.0 s`
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Knowledge Check

  • A force of 50 N moves a body

    A
    Frictional force exerted on the body is less than 50N
    B
    Frictional force exerted on the body is more than 50 N
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  • A particle starts with a velocity of 150 cm/s and moves in a straight line with a retardation of 10cm//s^(2) . How long does the particle take to pass through the initial point?

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    15 sec
    B
    45 sec
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  • A force of 1 N acts on a body of mass 0.5 kg initially at rest. The ratio of the works done by the force in the first, second and third second is :

    A
    1:2:3
    B
    `1:2:5`
    C
    `1:3:5`
    D
    `1:5:9`

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