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contents:
Engl
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 2.4.1. Calculation of
the force developed by system of mobile elements
According to the same theorem, change of a linear momentum of system of bodies to equally sum of all external forces enclosed to mechanical system .
On conditions of our task this equality is carried out: external forces are absent also change of a linear momentum of all system to equally zero.
At the same time, the plot on Fig. 5 describing moving of system of bodies, is not rectilinear. Let's try to find force which could cause similar moving for the same interval of force for a body, the same mass, as well as mass of all closed system.
Force Corresponding projections of acceleration which would be caused by the given force, are defined, how:
Let's make system of the equations:
where: The decision of system of the equations (36) results in the following:
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2. 
let's
define in projections to axes: 
And 
And 
coordinates of position of the center of mass of all closed
system (
. 
