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CBSE Class 9 Answered

URGENT
Asked by | 20 Jul, 2009, 09:33: AM
answered-by-expert Expert Answer

s = ut + at2 / 2

a = 2s / t2           [ as body starts from rest]

     = 2 x 270 / ( 3 x 3 )

      = 60 m /s2

thus, body moves with a constant acceleration of 60 m/s2

To find the velocity at the end of 10 s ; v = u + at

                                                                        = 0 + ( 60 ) ( 10 )

                                                                        = 600 m/s

Answered by | 20 Jul, 2009, 01:49: PM

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