Why does the weaker force of gravity dominate over electrical forces for astronomical objects?

Forces of gravity depend on quantities of mass, whereas electrical forces depend on quantities of net charge.

If gravitational forces dominate over electrical forces, it can only be because the amounts of net charge involved are much much much much much smaller than the amounts of mass involved.

What I'm saying is ... this doesn't mean that there aren't huge amounts of electric charge present in stars, planets, comets, and other astronomical objects.  But most of the charges are BALANCED ... there are equal amounts of positive and negative charge present in the same object, and there's very little of either kind left over, to be attracted or repelled by other objects.

the answer is f1 and d2 because if you put equal force on those two points the beam would balance trust me on this

the minimum constant speed at which she can catch the train is 2.7 m/s

given:

acceleration = 0.6

time = 4.5 s

to find:

velocity = ?

formula used:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

solution:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

v = 0 + (0.6 × 4.5)

v = 2.7 m/s

the minimum constant speed at which she can catch the train is 2.7 m/s