Two electrons move side by side with the same velocity as shown in the figure here. At what speed v will each experience zero
net force given the frame of reference implied in the figure? Ignore
electromagnetic induction, and if you are familiar with Special
Relativity, you may ignore it for this question as well

here we know that ball will drop down by total distance 3.2 m

so here we know that

now using kinematics

now in the same time it will cover horizontal distance of 0.75 m

so speed of the ball will be

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0 = 0.40 / 0 = 0

= 0.20 = 9.80 ⁄2 =?

=0 , = = 0.20 =0.50 0 0.40 ⁄

=0−122 =0−12(9.80 ⁄2)(0.50)2 =1.2