A body moving with uniform velocity 5u is subject to uniform retardation a. It returns to the
starting point after
(W) S

Question

A body moving with uniform velocity 5u is subject to uniform retardation a. It returns to the
starting point after
(W) Su/a sec
(6) 10u/a sec
(20u/a sec
(d) 10a/u sec​

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Serenity 6 months 2021-06-23T04:45:29+00:00 2 Answers 0 views 0

Answers ( )

    0
    2021-06-23T04:46:29+00:00

    Step-by-step explanation:

    I. By III equation of motion,

    v

    2

    =u

    2

    +2as

    (5v)

    2

    =u

    2

    +2as

    25v

    2

    −u

    2

    =2as

    24u

    2

    =s

    2a

    ∴ Distance travelled =S=

    a

    12u

    2

    II. v

    2

    =u

    2

    +2as

    v

    2

    =(5u)

    2

    +2(−a)(

    a

    12v

    2

    )

    v

    2

    =25v

    2

    −24u

    2

    v

    2

    =u

    2

    v=1u

    ⇒v=−u.

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    0
    2021-06-23T04:47:02+00:00

    Answer:

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