Ask Question
25 July, 21:59

Margy is trying to improve her cardio endurance by performing an exercise in which she alternates walking and running 100.0 m each. If Margy is walking at 1.4 m/s and accelerates at 0.20 m/s2 during one of the running portions, what is her final velocity at the end of the 100.0 m? Round your answer to the nearest tenth.

+4
Answers (2)
  1. 25 July, 22:17
    0
    The more simplistic answer is: 6.5 m/s
  2. 25 July, 22:25
    0
    This is an example of a straight-line motion problem. To find the final velocity, the following formulas are used:

    s = Vo*t + (1/2) * a*t^2

    Vf = Vo + at

    Where:

    Vf = final velocity = ?

    Vo = initial velocity = 1.4 m/s

    a = acceleration = 0.20 m/s^2

    s = displacement = 100m

    Substituting to the first equation:

    100 = 1.4t + (1/2) * 0.2*t^2

    t = 25.388s

    Substituting to the second equation:

    Vf = 1.4 + 0.2 (25.388)

    Vf = 6.5 m/s

    Therefore, her final velocity at the end of the 100m is 6.5 m/s.
Know the Answer?
Not Sure About the Answer?
Find an answer to your question 👍 “Margy is trying to improve her cardio endurance by performing an exercise in which she alternates walking and running 100.0 m each. If ...” in 📗 Physics if the answers seem to be not correct or there’s no answer. Try a smart search to find answers to similar questions.
Search for Other Answers