A person is straining to lift a large crate, without success because it is too heavy. We denote the forces on the crate as follows: force the person exerts on the crate, normal force exerted on the crate by the floor, and weight force exerted on the crate by the earth. Required:
How are the magnitudes of these forces related while the person is trying unsuccessfully to lift the crate?

Assume that two of the electrons at the negative terminal have attached themselves to a nearby neutral atom. there is now a negative ion with a charge -2e at this terminal. what are the electric potential and electric potential energy of the negative ion relative to the electron? the electric potential and the electric potential energy are both twice as much. the electric potential is twice as much and the electric potential energy is the same. the electric potential is the same and the electric potential energy is twice as much. the electric potential and the electric potential energy are both the same. the electric potential is the same and the electric potential energy is increased by the mass ratio of the oxygen ion to the electron. the electric potential is twice as much and the electric potential energy is increased by the mass ratio of the oxygen ion to the electron.