What will be the number of electron passing through a heater wire in one minute, if it carries a current of 8A

Explanation

Consider a bola with masses `m1,m2, and m3`. The balls are pulled by the binding thong and by gravity. (We neglect air resistence). Since the constraining forces on the instantaneous positions of all three balls, it is a real problem even to write the equation of motion of one ball. However, the total momentum obeys the simple equation.
`(dP)/dt=F_(ext)=f_1^(ext)+f_2^(ext)+f_3^(ext)=m_1g+m_2g+m_3g`
or `(dP)/dt=Mg`