Why the potential energy of the satellite comes negative? 

Why the total energy of satellite comes negative?

What is potential energy?

Choose the correct alternative : (a) If the zero of potential energy is at infinityn the total energy of an orbiting satellite is negative of its kinetic/potential energy. (b) The energy required to launch an orbiting satellite out of earth's gravitational influence is more/less than the energy required to project a stationary object at the same height (as the satellite) out of earth's influence.

If the zero of potential energy is at infinity, the total energy of an orbiting satellite is negative of its kinetic/potential energy.

Which fact indicates that the total energy of electron is negative?

The potential energy of an object is a relative concept.

Figures 2.8 (a) and (b) show the field lines of a positive and negative point charge respectively. (a) Give the signs of the potential difference V_(P)-V_(Q): V_(B)-V_(A) . (b) Give the sign of the potential energy difference of a small negative charge between the points Q and P, A and B. (c) Give the sign of the work done by the field in moving a small positive charge from Q to P. (d) Give the sign of the work done by the external agency in moving a small negative charge from B to A. (e) Does the kinetic energy of a small negative charge increase or decrease in going from B to A?

Statement-1 : Mechanical energy of a partical execting SHM is E. Maximum KE of particle may be greater than E. Statement-2 : Potential energy of a system may be negative.