Ask Question
9 December, 17:37

n principle, any time someone jumps up, the Earth moves in the opposite direction. To see why we are unaware of this motion, calculate the recoil speed of the Earth when a 75 kg person jumps upward at a speed of 2.0 m/s

+4
Answers (1)
  1. 9 December, 19:51
    0
    Explanation:.

    Given that,

    Let the mass of the person be

    m = 75kg

    Mass of the earth is

    M = 6 * 10²⁴ kg

    Spend of the person is

    v = 2m/s.

    Let the recoil speed of the earth be V.

    Using conservation of momentum

    P (initial) = P (final)

    Initial momentum is 0

    Pi = Pf

    0 = mv + MV

    V = - mv/M

    V = - 75 * 2 / 6*10²⁴

    V = - 2.5*10^-23 m/s

    Therefore, the recoil speed of the earth is 2.5*10^-23 and it is very very small, therefore, it is unmeasurable.
Know the Answer?
Not Sure About the Answer?
Get an answer to your question ✅ “n principle, any time someone jumps up, the Earth moves in the opposite direction. To see why we are unaware of this motion, calculate the ...” in 📙 Physics if there is no answer or all answers are wrong, use a search bar and try to find the answer among similar questions.
Search for Other Answers