You can imagine a conductor as an object that contains infinite amount of free charge(electrons) that roam around the conductor. These electrons are actually valence electron, and they can roam freely cause we imagine that the energy required to tear them from their atom is zero. Total charge of...
Hello!
The elevator is moving with constant velocity, so the net force acting on it is 0. (Ans 1.)
Also, work done by the cable equals the work against gravity (forces are equal!). (Ans.3)
i)The force is $$|mg|=|F_{upward}|$$
ii) 15s * 2m/s = 30m
iii) $$mgh = mg * 30m = 5000kg *...