Question

Три шарика одинаковой массы образуют замкнутую систему тел.Два шарика движутся на встречу друг другу с равными по модулю скоростями . Третий шарик не подвижен . Чему равен импульс данной системы тел?

Answer 1

Почему же 2mv?
два шарика движутся на встречу ждруг другу значит p1=mv , p2=-mv, третий не подвижен т.е. p3=0,
p=p1+p2+p3= mv-mv=0

Answer 2

Impulse of the System of Balls

The impulse of a system of objects is the total change in momentum of the system. In this case, we have three balls of equal mass forming a closed system. Two of the balls are moving towards each other with equal speeds, while the third ball is stationary.

To determine the impulse of the system, we need to calculate the total change in momentum. The momentum of an object is given by the product of its mass and velocity.

Let's denote the mass of each ball as m and the velocity of the moving balls as v.

The initial momentum of the system is zero since the third ball is stationary. The final momentum of the system will also be zero because the two moving balls will collide and come to rest.

Therefore, the change in momentum of the system is zero, and the impulse of the system is also zero.

Impulse of the system of balls: 0.

Please note that the provided information did not include specific values for the mass or velocity of the balls. If you have any specific values, I can help you calculate the impulse using those values.