What will be the effect of this action on the earth according to the law of conservation of momentum if two billion people jump above the earth’s surface with a speed of 4m/s from the same spot. The mass of the earth is 6x10²⁴ kg. The average mass of one person is 60 kg.
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nothing would happen
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Suppose we take the earth as well as the people comprising it as the main system, in this case there will essentially be no outside forces acting on the system.
Two conserved categories will be momentum and energy. 1 and 2 can be any two times.
Let us assume that the time 1 is right when the people jump and reach the highest point, and time 2 is when the people are at their highest point.
The kinetic and the gravitational energy both will be conserved.
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