Compute your average velocity in the following two cases: a) You walk 76.8m at a speed of 1.41m/s and then run 76.8m at a speed of 3.41m/s along straight track. b)You walk for 1.00 min at a speed of 1.41 m/s and then run for 1.13min at 3.41m/s along a straight track

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Alexia Mata · Accepted Answer

Solution:(a) We know that average speed      V    a    =      Total distance    Total time    =                    s        1            +              s        2                            t        1            +              t        2                 here       s    1    =  76  ⋅  8  m  ,         s    2    =  76  ⋅  8  m      t    1    =            s      1              v      1        =            s      1        1.41          t    1    =            s      2              v      2        =            s      1        3.41          ∴      s    1    =      s    2    =  76.8  m  ∴      v    a    =                    s        1            +              s        1                                      s          1                1.41            +                        s          1                3.41                =            2      ×      1.41      ×      3.41              1.41      +      3.41        m      /    s        v    a    =      9.616    4.82    =  1.995  m      /    s  (  A  n  s  w  e  r  )(b) Again      v    a    ′    =                    s        1        ′            +              s        2        ′                            t        1        ′            +              t        2        ′            Here       t    1    ′    =  1  min  =  60  s  ∴      s    1    ′    =      v    1    ′    =      t    1    ′    =  1.41  ×  60  =  84.6  m      t    2    ′    =  1.13  min  =  1.13  ×  60  s  =  67.8  s  ∴      s    2    ′    =      v    2    ′        t    2    ′    =  3.41  ×  1.13  ×  60  s  =  231.198  m  ∴      v    a    ′    =            84.6      +      231.198              60      +      67.8        m      /    s    =      315.798    127.8    m      /    s      v    a    ′    =  2.471  m      /    s (Answer)

Compute your average velocity in the following two cases: a) You walk 76.8m at a speed of 1.41m/s and then run 76.8m at a speed of 3.41m/s along straight track. b)You walk for 1.00 min at a speed of 1.41 m/s and then run for 1.13min at 3.41m/s along a straight track

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