Four ropes each attached to the end of a freight elevator are used to pull the small elevator upward through a wide elevator shaft of the forces list below which act upon the elevator

e

explanation:

there is no change in the electric potential energy as it is in rest on both conditions.

probably not if net force is zero

this is poiselle's equation from fluid mechanic in physics. mech eng

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.